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          <link:loc xlink:type="locator" xlink:href="ck0001633858-20251231.xsd#ck0001633858_UnitedComfortGroupMember" xlink:label="ck0001633858_UnitedComfortGroupMember"/>
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          <link:loc xlink:type="locator" xlink:href="ck0001633858-20251231.xsd#ck0001633858_EmbarkMember" xlink:label="ck0001633858_EmbarkMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001633858-20251231.xsd#ck0001633858_FMGSuiteMember" xlink:label="ck0001633858_FMGSuiteMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001633858-20251231.xsd#ck0001633858_PrecisionConceptsMember" xlink:label="ck0001633858_PrecisionConceptsMember"/>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MidwestRegionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">US Midwest Region [Member]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Related Party Transactions [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of fees due to related parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Incorporation, State or Country Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_IncreaseDecreaseInFeesDueToInvestmentAdvisor_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of increase (decrease) in fees due to investment advisor.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_IncreaseDecreaseInFeesDueToInvestmentAdvisor_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Fees Due To Investment Advisor</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_IncreaseDecreaseInFeesDueToInvestmentAdvisor_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">(Decrease) increase in fees due to investment advisor</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCurrentReportingStatus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Current Reporting Status</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpensesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Expenses [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpensesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Inputs, Level 2 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Level 2</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments and Contingencies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromDispositionOfInvestmentOperatingActivity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Disposition of Investment, Operating Activity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromDispositionOfInvestmentOperatingActivity_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Proceeds from investments sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyFinancialHighlightsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Financial Highlights [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyFinancialHighlightsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of financial highlights of the company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Shares Authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, shares authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Affiliated Issuer, Noncontrolled [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment, Affiliated Issuer, Noncontrolled [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyTaxReclassificationIncreaseDecreaseInAccumulatedNetRealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of increase (decrease) from reclassification due to accumulated net realized gain (loss) of permanent difference for distribution to ownership interest holder by investment company.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyTaxReclassificationIncreaseDecreaseInAccumulatedNetRealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Tax Reclassification, Increase (Decrease) in accumulated Net Realized Gain (Loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyTaxReclassificationIncreaseDecreaseInAccumulatedNetRealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated net realized gain (loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Fiscal Period Focus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityShellCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Shell Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractualObligation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contractual Obligation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractualObligation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contractual payment obligations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Accrued Liabilities, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fee due to administrator</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ConsumerGoodsDurableSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Sector of the economy consisting of companies engaged in Consumer Goods: Durable.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ConsumerGoodsDurableSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Consumer Goods Durable Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ConsumerGoodsDurableSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consumer Goods: Durable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash and Cash Equivalent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash and cash equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementStrategyAndGovernanceAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management, Strategy, and Governance [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentBasisSpreadVariableRatePaidInKind_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage added to reference rate used to compute variable rate paid in kind on investment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentBasisSpreadVariableRatePaidInKind_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Basis Spread, Variable Rate, Paid in Kind</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentBasisSpreadVariableRatePaidInKind_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Spread, Paid in Kind</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Shares, Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, shares issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Beginning of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleReportToBoardFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Board of Directors Oversight [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Asset Class [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Investment Income (Loss) from Operations, Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net increase in net assets resulting from operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIndustrySectorExtensibleEnumeration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Industry Sector [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIndustrySectorExtensibleEnumeration_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment, Industry Sector [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedBalancePrincipalAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Par/Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedBalancePrincipalAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Owned, Balance, Principal Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIdentifierAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Identifier [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIdentifierAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment, Identifier [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ExciseTaxRate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Excise tax rate.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ExciseTaxRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Excise Tax Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ExciseTaxRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of excise tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReceivableInvestmentSale_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Receivable, Investment, Sale</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReceivableInvestmentSale_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Receivable from investments sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFilerCategory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Filer Category</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MatrixPricingMarketAnalysisMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Matrix Pricing Market Analysis [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MatrixPricingMarketAnalysisMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Matrix Pricing Market Analysis [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MatrixPricingMarketAnalysisMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Matrix Pricing/Market Analysis</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Interest Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesByIndustryAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Industry Sector [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesByIndustryAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Industry Sector [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SummaryOfInvestmentHoldingsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Summary of Investment Holdings [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SummaryOfInvestmentHoldingsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherInvestmentNotReadilyMarketableQuotedValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other investments valued at the purchase price</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EnergySectorOilAndGasMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sector of economy consisting of companies engaged in business activity related to energy representing oil and gas.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EnergySectorOilAndGasMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Energy Sector, Oil And Gas [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EnergySectorOilAndGasMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Energy: Oil &amp; gas</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EnvironmentalIndustriesSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Sector of the economy consisting of companies engaged in Environmental Industries.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EnvironmentalIndustriesSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Environmental Industries Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EnvironmentalIndustriesSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Environmental Industries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskThirdPartyOversightAndIdentificationProcessesFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Third Party Oversight and Identification Processes [Flag]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_QuarterlyFinancialInformationDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Quarterly Financial Information Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForPurchaseOfSecuritiesOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments for Purchase of Securities, Operating Activities</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyVoluntaryFeeWaived_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Voluntary Fee Waived</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyVoluntaryFeeWaived_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Base management fee waivers</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Events</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementThirdPartyEngagedFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Third Party Engaged [Flag]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentsIncorporatedByReferenceTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Documents Incorporated by Reference [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsMaturityAndPrincipalRepaymentsYearThree_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of investments, principal repayments and maturing in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsMaturityAndPrincipalRepaymentsYearThree_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments, Maturity and Principal Repayments, Year Three</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsMaturityAndPrincipalRepaymentsYearThree_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2028</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Income, Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_SegmentGeographicalDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Geographical [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_SegmentGeographicalDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Geographical [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MeasurementInputTotalLeverageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to measurement input using total leverage.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MeasurementInputTotalLeverageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Total Leverage [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MeasurementInputTotalLeverageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total Leverage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ElectricityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Energy: Electricity [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ElectricityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Electricity [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PercentageOfInvestmentsAtFloatingRates_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Investments at Floating Rates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PercentageOfInvestmentsAtFloatingRates_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of Investments at Floating Rates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PercentageOfInvestmentsAtFloatingRates_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of investments at floating rates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentMaturityDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Maturity Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentMaturityDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maturity Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Value, Dividend Reinvestment Plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reinvestment of common stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Reinvested Dividends</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Variable Interest Rate, Type [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment, Variable Interest Rate, Type [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Significant Accounting Policies [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Significant Accounting Policies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MeasurementInputTotalEnterpriseValueCoverageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to measurement input using total enterprise value coverage.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MeasurementInputTotalEnterpriseValueCoverageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Total Enterprise Value Coverage [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MeasurementInputTotalEnterpriseValueCoverageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">TEV Coverage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PercentageOfIncentiveFee_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The percentage of incentive fee.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PercentageOfIncentiveFee_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Incentive Fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PercentageOfIncentiveFee_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Incentive fee (in percent)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossFromNetUnrealizedDepreciationAppreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of gain (loss) from net unrealized (depreciation) appreciation from asset measured at fair value on recurring basis using unobservable input (level 3).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossFromNetUnrealizedDepreciationAppreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain Loss From Net Unrealized (Depreciation) Appreciation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossFromNetUnrealizedDepreciationAppreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net unrealized (depreciation) appreciation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementStrategyAndGovernanceTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management, Strategy, and Governance [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of computation of basic and diluted net increase in net assets resulting from operations per weighted average shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MeasurementInputInterestCoverageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to measurement input using interest coverage.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MeasurementInputInterestCoverageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Interest Coverage [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MeasurementInputInterestCoverageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest Coverage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyDistributionOrdinaryIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Distribution, Ordinary Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyDistributionOrdinaryIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Distributions of ordinary income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyDistributionOrdinaryIncome_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Distributions of ordinary income to common stockholders</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentUnaffiliatedIssuerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-Control/Non-Affiliate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentUnaffiliatedIssuerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Unaffiliated Issuer [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentUnaffiliatedIssuerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">NON-CONTROL/NON-AFFILIATE INVESTMENTS</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share, Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net increase in net assets resulting from operations - basic (in dollars per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Earnings Per Share, Basic, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net increase in net assets resulting from operations per common share - basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RealizedInvestmentGainsLossesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Realized Investment Gains (Losses) [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RealizedInvestmentGainsLossesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Realized and Unrealized (Loss) Gain on Non-Control/Non-Affiliate Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PreIncentiveFeeNetInvestmentIncomeDoesNotExceedHurdleOf1.04.0AnnualizedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the member information pertaining to pre-incentive fee net investment income does not exceed the hurdle of 1.0% (4.0% annualized);</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PreIncentiveFeeNetInvestmentIncomeDoesNotExceedHurdleOf1.04.0AnnualizedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pre-Incentive Fee Net Investment Income Does Not Exceed The Hurdle Of 1.0% (4.0% Annualized) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PreIncentiveFeeNetInvestmentIncomeDoesNotExceedHurdleOf1.04.0AnnualizedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pre-incentive fee net investment income does not exceed the hurdle of 1.0% (4.0% annualized)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssued1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssued1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Supplemental non-cash information Issuance of common shares in connection with dividend reinvestment plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssued1_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Issuance of common shares in connection with dividend reinvestment plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NoninterestExpenseDirectorsFees_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Director Fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NoninterestExpenseDirectorsFees_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Directors' fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EnergyOilGasMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Energy: Oil &amp; Gas [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EnergyOilGasMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Energy: Oil &amp; Gas [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyTotalReturn_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Total Return</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyTotalReturn_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total return</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_OtherUsRegionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Region of United States of America (US) designated as other.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_OtherUsRegionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other US Region [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_OtherUsRegionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsMaturityAndPrincipalRepaymentsYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of investments, principal repayments and maturing in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsMaturityAndPrincipalRepaymentsYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments, Maturity and Principal Repayments, Year Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsMaturityAndPrincipalRepaymentsYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2027</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unrecognized Tax Benefits, Income Tax Penalties Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Penalties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Adjustments to reconcile net increase in net assets from operations to net cash provided by (used in) operating activities:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncentiveFeeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Incentive Fee Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncentiveFeeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Incentive fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyExpenseRatioBeforeIncentiveAllocation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Expense Ratio before Incentive Allocation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyExpenseRatioBeforeIncentiveAllocation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ratio of gross expenses before incentive fees to average net assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RealizedGainLossInvestmentAndDerivativeOperatingAfterTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Realized Gain (Loss), Investment and Derivative, Operating, after Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RealizedGainLossInvestmentAndDerivativeOperatingAfterTax_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net realized loss from investment transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RealizedGainLossInvestmentAndDerivativeOperatingAfterTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net realized (loss) gain on investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentAdvisoryAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the member information pertaining to Investment Advisory Agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentAdvisoryAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Advisory Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentAdvisoryAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment Advisory Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Tax Basis, Unrealized Gain</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross unrealized appreciation for federal income tax purposes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_WaiversToManagementFeeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of waivers to management fees.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_WaiversToManagementFeeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Waivers to Management Fee Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_WaiversToManagementFeeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Waivers to the base management fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity, Attributable to Parent [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of changes in fair value, broken out by security type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntitySmallBusiness_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Small Business</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MarketApproachValuationTechniqueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Valuation, Market Approach [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MarketApproachValuationTechniqueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Market Analysis</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retained Earnings (Accumulated Deficit)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total distributable earnings (loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AdjustmentsToCostBasisOnDebtInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of adjustments to cost basis on debt investments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AdjustmentsToCostBasisOnDebtInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments to Cost Basis on Debt Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AdjustmentsToCostBasisOnDebtInvestments_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Adjustments to cost basis on debt investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesIndustryMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Industry Sector [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesIndustryMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Industry Sector [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityWellKnownSeasonedIssuer_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Well-known Seasoned Issuer</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_WaiversToIncentiveFees_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of waivers to incentive fees.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_WaiversToIncentiveFees_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Waivers to Incentive Fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_WaiversToIncentiveFees_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Waivers of the incentive fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockPricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of Stock, Price Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockPricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate offering price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EnergySectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Energy Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EnergySectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Energy: Electricity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ScheduleOfInvestmentAtFairValueByIndustryTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the tabular information of investments at fair value by industry classifications.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ScheduleOfInvestmentAtFairValueByIndustryTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Investment at Fair Value By Industry [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ScheduleOfInvestmentAtFairValueByIndustryTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of investments at fair value by industry classifications</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Organization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AmendmentFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amendment Flag</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtAndEquitySecuritiesRealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt and Equity Securities, Realized Gain (Loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtAndEquitySecuritiesRealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Net realized gain (loss) on investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtAndEquitySecuritiesRealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Debt and Equity Securities, Realized Gain (Loss), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtAndEquitySecuritiesRealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Net realized loss on investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtAndEquitySecuritiesRealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net realized loss on investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Postal Zip Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Operating Activity, Including Discontinued Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash provided by operating activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AnalysisOfTrendInLeverageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Valuation technique using the average of trend in leverage.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AnalysisOfTrendInLeverageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Analysis of Trend in Leverage [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AnalysisOfTrendInLeverageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Analysis of Trend in Leverage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskRoleOfManagementTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Role of Management [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Address Line One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transferred out of Level 3</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Transfers out of Level 3</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MetalsMiningSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Sector of the economy consisting of companies engaged in Metals &amp; Mining.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MetalsMiningSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Metals &amp; Mining Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MetalsMiningSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Metals &amp; Mining</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Hierarchy and NAV [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Increase in Net Assets Resulting from Operations Per Share of Common Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyOtherTemporaryBookOrTaxDifferences_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of other temporary book or tax differences in investment company.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyOtherTemporaryBookOrTaxDifferences_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Other Temporary Book or Tax Differences</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyOtherTemporaryBookOrTaxDifferences_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other temporary book/tax differences</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIssuerNameExtensibleEnumeration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Issuer Name [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIssuerNameExtensibleEnumeration_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment, Issuer Name [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NumberOfInvestmentsWithAggregateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the number of investments with aggregate fair value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NumberOfInvestmentsWithAggregateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Investments with Aggregate Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NumberOfInvestmentsWithAggregateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Number of investments with aggregate fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NumberOfInvestmentsWithAggregateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of portfolio investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsMaturityAndPrincipalRepaymentsYearOne_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of investments, principal repayments and maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsMaturityAndPrincipalRepaymentsYearOne_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments, Maturity and Principal Repayments, Year One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsMaturityAndPrincipalRepaymentsYearOne_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2026</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ManagementFeeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Management Fee Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ManagementFeeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Base management fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_IncentiveFeeAsPercentOfPreIncentiveFeeNetInvestmentIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The incentive fee as a percent of pre incentive fee net investment income.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_IncentiveFeeAsPercentOfPreIncentiveFeeNetInvestmentIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Incentive Fee As Percent Of Pre Incentive Fee Net Investment Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_IncentiveFeeAsPercentOfPreIncentiveFeeNetInvestmentIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Incentive fee as a percent of pre-incentive fee net investment income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentType_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxesPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Taxes Paid, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxesPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Supplemental non-cash information Payment-in-kind ("PIK") interest income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxesPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">PIK interest income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Central Index Key</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_FeeDueToAdministrator_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of fees due to administrator, as of the balance sheet date.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_FeeDueToAdministrator_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fee Due To Administrator</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_FeeDueToAdministrator_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fee due to administrator</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_FeeDueToAdministrator_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Fee due to Administrator, net of waivers</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeInvestmentExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Income, Investment Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeInvestmentExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Expenses before waivers from investment adviser and administrator</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskProcessForInformingBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyNetAssetsRollForward_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Net Assets [Roll Forward]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyNetAssetsRollForward_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ValuationTechniqueAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Valuation Approach and Technique [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net (decrease) increase in cash and cash equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestIncomeOperating_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Income, Operating</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestIncomeOperating_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total interest income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestIncomeOperating_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyTaxOnDividendDistribution_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of tax character on distributions declared and paid from ordinary income.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyTaxOnDividendDistribution_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company Tax On Dividend Distribution</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyTaxOnDividendDistribution_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tax on distributions declared and paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Par or Stated Value Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, par value per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ObservableInputsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Observable Inputs [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ObservableInputsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Observable Inputs [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ObservableInputsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Observable inputs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfShortTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repayments of Short-Term Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfShortTermDebt_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Repayments of short-term borrowings</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdministrativeFeesExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Administrative Fees Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdministrativeFeesExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Administrative fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetNetAmortizationOfPremiumsPikDiscountsAndFees_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of net amortization of premiums, PIK, discounts and fees from asset measured at fair value on recurring basis using unobservable input (level 3).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetNetAmortizationOfPremiumsPikDiscountsAndFees_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Asset, Net Amortization of Premiums, PIK, Discounts and Fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetNetAmortizationOfPremiumsPikDiscountsAndFees_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net amortization of premiums, PIK, discounts and fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Expense, after Reduction of Fee Waiver and Reimbursement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursement_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total expenses, net of waivers</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestIncomeOperatingPaidInCash_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Income, Operating, Paid in Cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestIncomeOperatingPaidInCash_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest income related to cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestIncomeOperatingPaidInCash_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Interest on cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFinStmtErrorCorrectionFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Financial Statement Error Correction [Flag]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Borrowings</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyIncreaseDecreaseFromShareTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Capital Share Transaction, Increase (Decrease)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyIncreaseDecreaseFromShareTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net increase (decrease) in net assets from capital share transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WestRegionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">US West Region [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WestRegionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">West</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current Fiscal Year End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetRecurringBasisStillHeldUnrealizedGainLossStatementOfIncomeExtensibleList_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, State or Province</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyInvestmentIncomeLossRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Investment Income (Loss) Ratio</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyInvestmentIncomeLossRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ratio of net investment income to average net assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedBalanceShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Owned, Balance, Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedBalanceShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Par/Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_QuarterlyFinancialDataAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Quarterly Financial Data [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_QuarterlyFinancialDataAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Data</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_StatementGeographicalAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Geographical [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_StatementGeographicalAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Geographical [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetInvestmentIncomeAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Investment Income [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetInvestmentIncomeAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-Control/Non-Affiliate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfIncomeExtensibleList_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Accrued Interest Receivable, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Increase in interest receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Decrease (increase) in interest receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_DebtEquityAndPreferredSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to debt, equity and preferred shares.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_DebtEquityAndPreferredSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt, Equity and Preferred Shares [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_DebtEquityAndPreferredSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt, equity and preferred shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfessionalFees_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Professional Fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfessionalFees_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Professional fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyUnfundedCapitalCommitmentsByCompanyInvestors_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of unfunded capital commitments by the Company's investors to investment company.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyUnfundedCapitalCommitmentsByCompanyInvestors_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Unfunded Capital Commitments By The Company Investors</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyUnfundedCapitalCommitmentsByCompanyInvestors_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unfunded capital commitments by the Company's investors</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ConsumerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">consumer [member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ConsumerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">consumer</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyIndemnificationDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">No definition available.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyIndemnificationDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Indemnification</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Events [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentAdvisoryFee_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Advisory Fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentAdvisoryFee_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Investment Advisory Fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentAdvisoryFee_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment Advisory Fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_UtilitiesElectricMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Sector of the economy consisting of companies engaged in Utilities: Electric.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_UtilitiesElectricMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Utilities: Electric [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_UtilitiesElectricMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Utilities: Electric</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentInterestRatePaidInKind_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Interest Rate, Paid in Kind</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentInterestRatePaidInKind_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest Rate (paid in kind)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsNonAccrualStatusFairMarketValuePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The loans on non-accrual status as percentage of total portfolio at fair value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsNonAccrualStatusFairMarketValuePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments Non Accrual Status, Fair Market Value Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsNonAccrualStatusFairMarketValuePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment on non-accrual, Percentage of fair market value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EquityAndPreferredShareMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity And Preferred Shares [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EquityAndPreferredShareMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity And Preferred Share [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EquityAndPreferredShareMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Equity And Preferred Share [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyCapitalShareTransactionsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Capital Share Transaction, Increase (Decrease) [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyCapitalShareTransactionsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Capital Share Transactions:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentAdvisoryFees_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Advisory Fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentAdvisoryFees_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Investment Advisory Fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentAdvisoryFees_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment Advisory Fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AutomotiveSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Automotive Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AutomotiveSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Automotive [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AerospaceSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Aerospace Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AerospaceSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aerospace &amp; Defense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MinimumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Minimum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MinimumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_WholesaleSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Sector of the economy consisting of companies engaged in Wholesale.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_WholesaleSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Wholesale Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_WholesaleSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Wholesale [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PreIncentiveFeeNetInvestmentIncomeExceedHurdleOf1.765InAnyQuarter4.706AnnualizedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the member information pertaining to pre-incentive fee net investment income, if any, that exceeds 1.1765% in any calendar quarter (4.706% annualized).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PreIncentiveFeeNetInvestmentIncomeExceedHurdleOf1.765InAnyQuarter4.706AnnualizedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pre-Incentive Fee Net Investment Income Exceed The Hurdle Of 1.765% in Any Quarter (4.706%% Annualized) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PreIncentiveFeeNetInvestmentIncomeExceedHurdleOf1.765InAnyQuarter4.706AnnualizedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pre-incentive fee net investment income, if any, that exceeds 1.1765% in any calendar quarter (4.706% annualized)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNetAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Tax Basis, Unrealized Gain (Loss) [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_QuarterlyFinancialInformationTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Quarterly Financial Information [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_QuarterlyFinancialInformationTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Selected Quarterly Financial Data (Unaudited)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unobservable inputs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Inputs, Level 3 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Level 3</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Gain (Loss) on Investment, Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net realized (loss) gain on investments and change in unrealized (depreciation) appreciation on investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_BankingFinanceInsuranceRealEstateSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Sector of the economy consisting of companies engaged in Banking, Finance, Insurance &amp; Real Estate.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_BankingFinanceInsuranceRealEstateSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Banking, Finance, Insurance &amp; Real Estate Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_BankingFinanceInsuranceRealEstateSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Banking, Finance, Insurance &amp; Real Estate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Assets Measured on Recurring Basis [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of investments carried at fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyExpenseRatioBeforeFeeWaivers_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage, before deduction of fee waiver, of expense to average net assets.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyExpenseRatioBeforeFeeWaivers_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Expense Ratio Before Fee Waivers</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyExpenseRatioBeforeFeeWaivers_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ratio of gross expenses after incentive fees to average net assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Repurchased and Retired During Period, Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Fund executed</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Repurchases of common stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Fund executed</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyTaxReturnOfCapitalDistribution_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Tax Return of Capital Distribution</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyTaxReturnOfCapitalDistribution_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Return of capital to common stockholders</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyTaxReturnOfCapitalDistribution_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Return of capital to common stockholders</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_HealthcarePharmaceuticalsSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Sector of the economy consisting of companies engaged in Healthcare &amp; Pharmaceuticals.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_HealthcarePharmaceuticalsSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Healthcare &amp; Pharmaceuticals Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_HealthcarePharmaceuticalsSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Healthcare &amp; Pharmaceuticals</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments and contingencies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MeasurementInputSeniorLeverageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Senior Leverage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MeasurementInputSeniorLeverageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to measurement input using senior leverage.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MeasurementInputSeniorLeverageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Senior Leverage [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AuditorFirmId_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Auditor Firm ID</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShortTermBorrowings_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Short-Term Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShortTermBorrowings_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Short-term borrowings</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Income (Loss), Including Portion Attributable to Noncontrolling Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net increase in net assets resulting from operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_TotalInvestmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Total Investments [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_TotalInvestmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Total Investments [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_TotalInvestmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total Investments [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyTaxDisclosureItemsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Federal Tax Information (Unaudited)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyTaxDisclosureItemsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Tax Disclosure Items [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Positions or Committees Responsible [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NumberOfNewInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the number of new investments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NumberOfNewInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of New Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NumberOfNewInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Number of new investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Number of Shares Outstanding, Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average shares of common stock outstanding - basic (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Weighted Average Number of Shares Outstanding, Basic, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Weighted common shares outstanding - basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_DebtInvestmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Investments [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_DebtInvestmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt Investments [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_DebtInvestmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Investments [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_StockIssuedDuringPeriodValueDistributionToStockholders_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of stock issued during period value distribution to stockholders.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_StockIssuedDuringPeriodValueDistributionToStockholders_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value Distribution To Stockholders</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_StockIssuedDuringPeriodValueDistributionToStockholders_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Distributions to Stockholders</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskProcessForInformingManagementOrCommitteesResponsibleTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Events [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Events</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContainerAndPackagingSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Container and Packaging Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContainerAndPackagingSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Containers, Packaging &amp; Glass</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transactions Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party Transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity, Attributable to Parent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Net Assets, End of Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Net Assets, Beginning of Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total Net Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net assets at end of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments to Acquire Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amount of investments made at cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Payments to Acquire Investments, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Amount of investments in new investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BasisOfAccountingPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Basis of Accounting, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BasisOfAccountingPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Basis of Presentation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statements of Changes in Net Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MaximumAnnualizedRateOfIncentiveFeesAttributableToIncomeAndGains_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the maximum annualized rate of incentive fees attributable to income and gains.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MaximumAnnualizedRateOfIncentiveFeesAttributableToIncomeAndGains_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maximum Annualized Rate Of Incentive Fees Attributable To Income And Gains</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MaximumAnnualizedRateOfIncentiveFeesAttributableToIncomeAndGains_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum annualized rate of incentive fees attributable to income and gains</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PaymentsToAcquireExistingInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The cash outflow associated with the purchase of existing investments (debt, security, other) during the period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PaymentsToAcquireExistingInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments to Acquire Existing Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PaymentsToAcquireExistingInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Amount of investments in existing investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ValuationTechniqueDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Valuation Approach and Technique [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UseOfEstimates_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Use of Estimates, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UseOfEstimates_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Use of Estimates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NumberOfPortfolioCompaniesInvestedAtCost_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of portfolio companies invested by the companies at cost.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NumberOfPortfolioCompaniesInvestedAtCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Portfolio Companies Invested At Cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NumberOfPortfolioCompaniesInvestedAtCost_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of portfolio companies invested at cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncentiveFeePayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Incentive Fee Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncentiveFeePayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net incentive fee due to Adviser</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedAtFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Owned, Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedAtFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Market Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedAtFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Investment Owned, Fair Value, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedAtFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Investment Owned, Fair Value, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedAtFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-Control/Non-Affiliate investments (Cost of $420,392,905 and $416,973,715, respectively)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyAccumulatedNetRealizedLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount accumulated net realized loss from temporary book or tax differences in investment company.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyAccumulatedNetRealizedLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Accumulated Net Realized Loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyAccumulatedNetRealizedLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated net realized gain (loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyChangesInNetAssetsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Change in Net Assets [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyChangesInNetAssetsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of activity of Stockholders' Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NorthwestRegionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">US Northwest Region [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NorthwestRegionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Northwest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConstructionSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Construction Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConstructionSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Construction &amp; Building [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Expense, Operating and Nonoperating</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ChemicalsSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Chemicals Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ChemicalsSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Chemicals, Plastics &amp; Rubber</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfInvestmentsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Investments [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfInvestmentsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfInvestmentsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Commitments and Contingencies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SouthwestRegionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">US Southwest Region [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SouthwestRegionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Southwest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementExpertiseOfManagementResponsibleTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Expertise of Management Responsible [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsMaturityAndPrincipalRepaymentsYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of investments, principal repayments and maturing in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsMaturityAndPrincipalRepaymentsYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments, Maturity and Principal Repayments, Year Five</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsMaturityAndPrincipalRepaymentsYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2030</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShortTermDebtWeightedAverageInterestRateOverTime_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Short-Term Debt, Weighted Average Interest Rate, over Time</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShortTermDebtWeightedAverageInterestRateOverTime_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average yield</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related and Nonrelated Parties [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ValuationTechniqueMatrixPricingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Valuation Technique, Matrix Pricing [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ValuationTechniqueMatrixPricingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Matrix Pricing</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, City or Town</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIssuerAffiliationDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Issuer Affiliation [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchasedDuringPeriodShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock repurchased ($80,000,000 and $47,515,735, respectively)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchasedDuringPeriodShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Repurchased During Period, Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchasedDuringPeriodShares_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Common stock repurchased ($80,000,000 and $47,515,735, respectively)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsInNumberOfStates_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents investments in the number of states.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsInNumberOfStates_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments In Number Of States</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsInNumberOfStates_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Investments in number of states</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlementsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlementsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">New investments, repayments and settlements:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_FeesDueToInvestmentAdvisorNetOfWaivers_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of fees due to investment advisor, net of waivers as of the balance sheet date.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_FeesDueToInvestmentAdvisorNetOfWaivers_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fees Due To Investment Advisor, Net Of Waivers</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_FeesDueToInvestmentAdvisorNetOfWaivers_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fees due to investment advisor, net of waivers</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_FeesDueToInvestmentAdvisorNetOfWaivers_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total fees due to Adviser, net of waivers</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyTaxReclassificationIncreaseDecreaseInCapitalInExcessOfParValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of increase (decrease) from reclassification to paid-in capital of permanent difference for distribution to ownership interest holder by investment company.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyTaxReclassificationIncreaseDecreaseInCapitalInExcessOfParValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Tax Reclassification, Increase (Decrease) in Capital in Excess of Par Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyTaxReclassificationIncreaseDecreaseInCapitalInExcessOfParValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Capital in excess of par value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyInvestmentOrdinaryIncomeLossPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company Investment Ordinary Income Loss Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyInvestmentOrdinaryIncomeLossPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Investment Company Investment Ordinary Income Loss Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyInvestmentOrdinaryIncomeLossPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ordinary income loss per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsInNumberOfDifferentNrIndustries_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents investments in the number of different industries.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsInNumberOfDifferentNrIndustries_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments In Number Of Different nr Industries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsInNumberOfDifferentNrIndustries_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Investments in number of different industries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FoodAndBeverageSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Food and Beverage Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FoodAndBeverageSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Beverage, Food &amp; Tobacco [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NetInvestmentIncomePerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Per share value of net investment income per share, diluted.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NetInvestmentIncomePerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Investment Income Per Share Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NetInvestmentIncomePerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net investment income - diluted (in dollars per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NetInvestmentIncomePerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net investment income per common share - diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentAcquisitionDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Acquisition Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentAcquisitionDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Acquisition Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedAtCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Owned, Cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedAtCost_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investments, at fair value, Non-Control/Non-Affiliate investments, cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedAtCost_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Amortized Cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedAtCost_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total Cost Basis of Debt Investments Held at December 31, 2025:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ServicesBusinessSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Sector of the economy consisting of companies engaged in Services: Business.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ServicesBusinessSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Services Business Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ServicesBusinessSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Services: Business [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MediaAdvertisingPrintingPublishingSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Sector of the economy consisting of companies engaged in Media: Advertising, Printing &amp; Publishing.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MediaAdvertisingPrintingPublishingSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Media: Advertising, Printing &amp; Publishing Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MediaAdvertisingPrintingPublishingSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Media: Advertising, Printing &amp; Publishing [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityNoteAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ProceedsFromSaleOfInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The cash inflow associated with the sale of all investments such as debt, security and so forth during the period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ProceedsFromSaleOfInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Sale of Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ProceedsFromSaleOfInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Amount received from repayments from investments sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Payable and Accrued Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued expenses and other liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Paid, Excluding Capitalized Interest, Operating Activity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Supplemental cash flow information Interest paid on short-term financing</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Interest paid on short-term financing</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statistical Measurement [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SummaryOfInvestmentHoldingsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Holdings [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Period End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Hierarchy and NAV [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_IcfrAuditorAttestationFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">ICFR Auditor Attestation Flag</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIssuerAffiliationAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Issuer Affiliation [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ScheduleOfInvestmentAtFairValueByGeographicRegionTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the tabular information of investments at fair value by geographic regions.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ScheduleOfInvestmentAtFairValueByGeographicRegionTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Investment at Fair Value By Geographic Region [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ScheduleOfInvestmentAtFairValueByGeographicRegionTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of investments at fair value by geographic regions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NumberOfInvestmentsWithPaidInKindInterestComponent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The number of investments which had a PIK interest component.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NumberOfInvestmentsWithPaidInKindInterestComponent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Investments with Paid-in Kind Interest Component</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NumberOfInvestmentsWithPaidInKindInterestComponent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of investments which had a PIK interest component</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FeeIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fee Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FeeIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fee income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfFinancialPositionAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statements of Assets and Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfFinancialPositionAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statement of Assets and Liabilities Data</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AccruedOriginalIssueDiscountInvestmentIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of accrued original issue discount investment income.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AccruedOriginalIssueDiscountInvestmentIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Original Issue Discount Investment Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AccruedOriginalIssueDiscountInvestmentIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued OID income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementStrategyAndGovernanceLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management, Strategy, and Governance [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PeriodOfTerminationByPriorWrittenNotice_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Period of termination by prior written notice by either of the parties.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PeriodOfTerminationByPriorWrittenNotice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Period of Termination by Prior Written Notice</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PeriodOfTerminationByPriorWrittenNotice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Termination period by prior written notice (in days)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NetInvestmentIncomePerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Per share value of net investment income per share, basic.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NetInvestmentIncomePerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Investment Income Per Share Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NetInvestmentIncomePerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net investment income - basic (in dollars per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NetInvestmentIncomePerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net investment income per common share - basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_RelatedPartyTransactionBaseManagementFeeAnnualPercent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The percent of annualized base management fee.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_RelatedPartyTransactionBaseManagementFeeAnnualPercent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction, Base Management Fee, Annual, Percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_RelatedPartyTransactionBaseManagementFeeAnnualPercent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Base management fee (in percent)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NortheastRegionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">US Northeast Region [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NortheastRegionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Northeast</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_CapitalEquipmentSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Sector of the economy consisting of companies engaged in Capital Equipment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_CapitalEquipmentSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Capital Equipment Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_CapitalEquipmentSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Capital Equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Number of Shares Outstanding, Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average shares of common stock outstanding - diluted (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Weighted Average Number of Shares Outstanding, Diluted, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Weighted common shares outstanding - diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">No definition available.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain Loss [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total gains:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFileNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Securities Act File Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrealizedGainLossInvestmentAndDerivativeOperatingAfterTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unrealized Gain (Loss), Investment and Derivative, Operating, after Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrealizedGainLossInvestmentAndDerivativeOperatingAfterTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net change in unrealized (depreciation) appreciation on investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfDividendsCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments of Ordinary Dividends, Common Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfDividendsCommonStock_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Distributions paid to common stockholders</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_TelecommunicationsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Telecommunications [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_TelecommunicationsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Telecommunications [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_TelecommunicationsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Telecommunications</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CoverAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document and Entity Information</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TaxBasisOfInvestmentsGrossUnrealizedDepreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Tax Basis, Unrealized Loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TaxBasisOfInvestmentsGrossUnrealizedDepreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross unrealized depreciation for federal tax purposes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Accounts Payable and Accrued Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Increase (decrease) increase in accrued expenses and other liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentTypeCategorizationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentTypeCategorizationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investments [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyFederalTaxInformationDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company Federal Tax Information Disclosure Text Block</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyFederalTaxInformationDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Investment Company Federal Tax Information Disclosure Text Block</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyFederalTaxInformationDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Federal Tax Information (Unaudited)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsNonAccrualStatusCostPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The loans on non-accrual status as percentage of total portfolio at cost.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsNonAccrualStatusCostPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments Non Accrual Status, Cost Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsNonAccrualStatusCostPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment on non-accrual, Percentage of total portfolio at cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AlternativeInvestmentMeasurementInput_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Alternative Investment, Measurement Input</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AlternativeInvestmentMeasurementInput_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement input</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_UnitrancheDebtOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unitranche Debt One [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_UnitrancheDebtOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Unitranche Debt One [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_UnitrancheDebtOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unitranche Debt [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Tax Basis, Cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cost of investments for income tax purposes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_WaiverAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the member information pertaining to Waiver Agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_WaiverAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Waiver Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_WaiverAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Waiver Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MediaDiversifiedProductionSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Sector of the economy consisting of companies engaged in Media: Diversified &amp; Production.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MediaDiversifiedProductionSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Media: Diversified &amp; Production Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MediaDiversifiedProductionSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Media: Diversified &amp; Production [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfInvestmentsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Investments [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfInvestmentsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Investments [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">New Accounting Pronouncements, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">New Accounting Pronouncements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_IncentiveFeeOnCapitalGainsAsPercentOfRealizedCapitalGainsOnCumulativeBasis_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The incentive fee on capital gains as a percent of realized capital gains.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_IncentiveFeeOnCapitalGainsAsPercentOfRealizedCapitalGainsOnCumulativeBasis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Incentive Fee on Capital Gains As Percent Of Realized Capital Gains on Cumulative Basis</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_IncentiveFeeOnCapitalGainsAsPercentOfRealizedCapitalGainsOnCumulativeBasis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Incentive fee on capital gains (in percent)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyDividendDistribution_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Dividend Distribution</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyDividendDistribution_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate distributions declared and paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyDividendDistribution_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel">Total distributions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_IncentiveFeeQuarterlyHurdleRate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The percentage of quarterly hurdle rate .</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_IncentiveFeeQuarterlyHurdleRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Incentive Fee, Quarterly Hurdle Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_IncentiveFeeQuarterlyHurdleRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Hurdle rate per quarter (in percent)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyPortfolioTurnover_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Portfolio Turnover</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyPortfolioTurnover_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Portfolio turnover</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentTypeExtensibleEnumeration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Type [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentTypeExtensibleEnumeration_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment, Type [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AdditionalCapitalCommitments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of additional capital commitments received.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AdditionalCapitalCommitments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Additional Capital Commitments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AdditionalCapitalCommitments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amount of additional capital commitments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Shares, Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Common Stock, Shares, Outstanding, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Common Stock, Shares, Outstanding, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Shares of common stock outstanding at end of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementProcessesIntegratedFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Processes Integrated [Flag]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentTransitionReport_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Transition Report</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsMaturityAndPrincipalRepaymentsYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of investments, principal repayments and maturing in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsMaturityAndPrincipalRepaymentsYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments, Maturity and Principal Repayments, Year Four</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsMaturityAndPrincipalRepaymentsYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2029</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_NoTradingSymbolFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">No Trading Symbol Flag</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForRepurchaseOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments for Repurchase of Common Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForRepurchaseOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Repurchases of shares of common stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForRepurchaseOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Repurchases of shares of common stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfInvestmentsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfCashFlowsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statements of Cash Flows</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Value, New Issues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Issuance of shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net Increase in Net Assets Resulting from Operations Per Share of Common Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_UtilitiesWaterSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Sector of the economy consisting of companies engaged in Utilities: Water.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_UtilitiesWaterSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Utilities: Water Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_UtilitiesWaterSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Utilities: Water</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_IncentiveFeeNumberOfParts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The number of parts of incentive fees.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_IncentiveFeeNumberOfParts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Incentive Fee, Number of Parts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_IncentiveFeeNumberOfParts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of parts of incentive fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Fair Value as of end</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Fair Value as of beginning</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementProcessesIntegratedTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Processes Integrated [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Income, Operating, after Expense and Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net investment income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net increase in net assets resulting from operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net increase in net assets resulting from operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EnterpriseValueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Enterprise Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EnterpriseValueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Enterprise Value [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EnterpriseValueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Enterprise Value [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_UtilitiesElectricSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Sector of the economy consisting of companies engaged in Utilities: Electric.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_UtilitiesElectricSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Utilities: Electric Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_UtilitiesElectricSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Utilities: Electric</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtAndEquitySecuritiesGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt and Equity Securities, Gain (Loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtAndEquitySecuritiesGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net realized and unrealized loss on investment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InterestIncomeRecognitionPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of accounting policy for interest income recognition.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InterestIncomeRecognitionPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Income Recognition [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InterestIncomeRecognitionPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest Income Recognition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentBasisSpreadVariableRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Basis Spread, Variable Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentBasisSpreadVariableRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Spread</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PaymentsToAcquireNewInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The cash outflow associated with the purchase of new investments (debt, security, other) during the period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PaymentsToAcquireNewInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments to Acquire New Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PaymentsToAcquireNewInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Amount of investments in new investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TransportationSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Transportation Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TransportationSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transportation: Cargo</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentOwnedAtCostPercentageOfTotalPortfolioInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the percentage of total portfolio investments for amortized cost.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentOwnedAtCostPercentageOfTotalPortfolioInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Owned At Cost, Percentage Of Total Portfolio Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentOwnedAtCostPercentageOfTotalPortfolioInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of Total Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsMaturityAndPrincipalRepayments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of contractual repayments of investments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsMaturityAndPrincipalRepayments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments, Maturity and Principal Repayments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsMaturityAndPrincipalRepayments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total contractual repayments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PercentageOfQualifiedInterestIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Qualified Interest Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PercentageOfQualifiedInterestIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage Of Qualified Interest Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PercentageOfQualifiedInterestIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of Qualified Interest Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalYearFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Fiscal Year Focus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_SecondLienMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Second Lien Debt [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_SecondLienMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Second Lien [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_SecondLienMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Second Lien [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_RelatedPartyFeesDue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of total related party fees.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_RelatedPartyFeesDue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Fees, Due</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_RelatedPartyFeesDue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total Related Party Fees Due</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment Valuation Policy</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ScheduleOfInvestmentAtFairValueBySecurityTypeTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the tabular information of investments at fair value by security type.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ScheduleOfInvestmentAtFairValueBySecurityTypeTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Investment at Fair Value By Security Type [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ScheduleOfInvestmentAtFairValueBySecurityTypeTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of investments by security type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EastRegionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">US East Region [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EastRegionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">East</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetInvestmentIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Investment Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetInvestmentIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net Investment Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetInvestmentIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net investment income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsMaturityAndPrincipalRepaymentsAfterYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of investments, principal repayments and maturing in after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsMaturityAndPrincipalRepaymentsAfterYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments, Maturity and Principal Repayments, After Year Five</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsMaturityAndPrincipalRepaymentsAfterYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Thereafter</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyChangeInNetAssetsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of information about change in net assets (equity) of investment company.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyChangeInNetAssetsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Change in Net Assets [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_DebtSecuritieMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Securitie [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_DebtSecuritieMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt Securitie [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyDistributionToShareholdersPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Distribution to Shareholders, Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyDistributionToShareholdersPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate distributions declared and paid per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyDistributionToShareholdersPerShare_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Distributions to stockholders from net investment income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyAverageNetAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Average Net Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyAverageNetAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Average net assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Income (Loss) Available to Common Stockholders, Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net Income (Loss) Available to Common Stockholders, Basic, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Numerator for diluted net increase in net assets resulting from operations per common share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedPercentOfNetAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Owned, Net Assets, Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedPercentOfNetAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of net assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_HotelsGamingLeisureSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Sector of the economy consisting of companies engaged in Hotels, Gaming &amp; Leisure.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_HotelsGamingLeisureSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Hotels, Gaming &amp; Leisure Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_HotelsGamingLeisureSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Hotels, Gaming &amp; Leisure</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transfers into Level 3</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PayableInvestmentPurchase_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payable for investments purchased</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PayableInvestmentPurchase_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payable, Investment, Purchase</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_Security12bTitle_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Title of 12(b) Security</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyTaxDistributableLossEarnings_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of tax distributable (loss) earnings at period end due to temporary book or tax differences in investment company.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyTaxDistributableLossEarnings_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Tax Distributable (Loss) Earnings</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyTaxDistributableLossEarnings_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel">Components of tax distributable (loss) earnings at period end</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Changes in fair value for all investments for which the Company determines fair value using unobservable (Level 3) factors</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related and Nonrelated Parties [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ScheduleOfSignificantContractualContractualPaymentObligationsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The tabular disclosure of significant contractual payment obligations.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ScheduleOfSignificantContractualContractualPaymentObligationsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Significant Contractual Contractual Payment Obligations [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ScheduleOfSignificantContractualContractualPaymentObligationsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of significant contractual payment obligations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerUnitAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Unit [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerUnitAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Basic and Diluted per Share of Common Stock:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerUnitAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Per Share Data</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseShortTermBorrowings_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Expense, Short-Term Borrowings</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseShortTermBorrowings_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Interest Expense, Short-Term Borrowings, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseShortTermBorrowings_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest expense, short-term borrowings</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrecognizedTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unrecognized Tax Benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrecognizedTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrecognized tax benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Additional Paid-in Capital [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Capital in Excess of Par Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PreIncentiveFeeNetInvestmentIncomeDoesNotExceedHurdleOf1.765InAnyQuarter4.706AnnualizedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the member information pertaining to pre-incentive fee net investment income, if any, that exceeds the hurdle rate but is less than 1.1765 % in any calendar quarter (4.706% annualized).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PreIncentiveFeeNetInvestmentIncomeDoesNotExceedHurdleOf1.765InAnyQuarter4.706AnnualizedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pre-Incentive Fee Net Investment Income Does Not Exceed The Hurdle Of 1.765% in Any Quarter (4.706%% Annualized) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PreIncentiveFeeNetInvestmentIncomeDoesNotExceedHurdleOf1.765InAnyQuarter4.706AnnualizedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pre-incentive fee net investment income, if any, that exceeds the hurdle rate but is less than 1.1765 % in any calendar quarter (4.706% annualized)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt and Equity Securities, Unrealized Gain (Loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net change in unrealized (depreciation) appreciation on investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Debt and Equity Securities, Unrealized Gain (Loss), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Net change in unrealized depreciation (appreciation) on investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ConsumerGoodsNonDurableSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Sector of the economy consisting of companies engaged in Consumer Goods: Non-Durable.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ConsumerGoodsNonDurableSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Consumer Goods Non-Durable Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ConsumerGoodsNonDurableSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consumer Goods: Non-Durable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyFinancialHighlightsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financial Highlights</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash flows from financing activities:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityExTransitionPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Ex Transition Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DistributionMadeToLimitedPartnerDistributionsDeclaredPerUnit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Distribution Made to Limited Partner, Distributions Declared, Per Unit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DistributionMadeToLimitedPartnerDistributionsDeclaredPerUnit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate distributions declared and paid per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ScheduleOfTemporaryDifferencesArisingFromAmortizationOfOrganizationalExpendituresTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tabular disclosure of temporary differences arising from amortization of organizational expenditures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ScheduleOfTemporaryDifferencesArisingFromAmortizationOfOrganizationalExpendituresTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Temporary Differences Arising from Amortization of Organizational Expenditures [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ScheduleOfTemporaryDifferencesArisingFromAmortizationOfOrganizationalExpendituresTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of temporary differences arising from amortization of organizational expenditures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementEquityComponentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Components [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Nonoperating Income (Expense)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total investment income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityComponentDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Component [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByAssetClassAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Asset Class [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_RevenueRecognitionOperatingSegmentPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenue Recognition Operating Segment [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_RevenueRecognitionOperatingSegmentPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Revenue Recognition Operating Segment [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_RevenueRecognitionOperatingSegmentPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating Segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_IncentiveFeePayableIfNoExcessIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of incentive fee payable to advisor if no excess income.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_IncentiveFeePayableIfNoExcessIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Incentive Fee Payable If No Excess Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_IncentiveFeePayableIfNoExcessIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Incentive fee payable on excess income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyFinancialHighlightsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial Highlights</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyFinancialHighlightsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Financial Highlights [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ServicesConsumerSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Sector of the economy consisting of companies engaged in Services: Consumer.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ServicesConsumerSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Services Consumer Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ServicesConsumerSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Services: Consumer</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentAnnualReport_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Annual Report</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MetalsAndMiningMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Sector of the economy consisting of companies engaged in metals and mining.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MetalsAndMiningMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Metals And Mining [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MetalsAndMiningMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Metals &amp; Mining [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_IncentiveFeeAnnualHurdleRate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The percentage of annual hurdle rate .</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_IncentiveFeeAnnualHurdleRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Incentive Fee, Annual Hurdle Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_IncentiveFeeAnnualHurdleRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Annual hurdle rate (in percent)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyInvestmentIncomeLossPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Investment Income (Loss), Per Share, Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyInvestmentIncomeLossPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net investment income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeNetAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeNetAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Income, Net [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MaximumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maximum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MaximumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Investment, Tax Basis, Unrealized Gain (Loss), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Tax Basis, Unrealized Gain (Loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net unrealized depreciation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statistical Measurement [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetailSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retail Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetailSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Retail [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Value, Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, $0.001 par value per share, 100,000,000 shares authorized, 47,020,468 and 47,020,454 shares issued and outstanding, respectively</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_DisclosureOfCapitalCommitmentsMadeByInvestorToCompanyTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tabular disclosure of capital commitments made by an investor to the Company.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_DisclosureOfCapitalCommitmentsMadeByInvestorToCompanyTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure Of Capital Commitments Made By An Investor To The Company [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_DisclosureOfCapitalCommitmentsMadeByInvestorToCompanyTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of capital commitments made by an investor to the Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeNonoperatingAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Income, Nonoperating [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeNonoperatingAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MeasurementInputLiquidityCoverageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to total enterprise value liquidity.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MeasurementInputLiquidityCoverageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Liquidity Coverage [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MeasurementInputLiquidityCoverageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Liquidity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Income (Loss) Available to Common Stockholders, Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net Income (Loss) Available to Common Stockholders, Diluted, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Numerator for basic net increase in net assets resulting from operations per common share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DistributedEarnings_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Distributed Earnings</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DistributedEarnings_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Distribution earning and profits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NumberOfInvestmentsInLoansWithOriginalIssueDiscount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The number of loans with original issue discount.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NumberOfInvestmentsInLoansWithOriginalIssueDiscount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Investments in Loans with Original Issue Discount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NumberOfInvestmentsInLoansWithOriginalIssueDiscount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of investments in loans with OID</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_HealthcareSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Healthcare Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_HealthcareSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Healthcare &amp; Pharmaceuticals [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyCommittedCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Committed Capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyCommittedCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Capital commitments made by an investor to the Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MinimumPercentageOnInvestmentCompanyTaxableIncomeToDistributeDividends_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Minimum percentage of the sum of its net ordinary income and net short-term capital gains in excess of net long-term capital losses, if any (i.e., "investment company taxable income) to timely distribute dividends out of assets legally available for distributions to its stockholders.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MinimumPercentageOnInvestmentCompanyTaxableIncomeToDistributeDividends_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Minimum Percentage on Investment Company Taxable Income to Distribute Dividends</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MinimumPercentageOnInvestmentCompanyTaxableIncomeToDistributeDividends_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum percentage to distribute dividends</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyFinancialRatiosAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Financial Ratios [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyFinancialRatiosAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ratio/Supplemental Data:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MeasurementInputDebtServiceCoverageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to measurement input using debt service coverage.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MeasurementInputDebtServiceCoverageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Debt Service Coverage [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MeasurementInputDebtServiceCoverageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Service Coverage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpenseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Nonoperating Income (Expense) [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpenseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-Control/Non-Affiliate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityPublicFloat_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Public Float</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EquityInvestmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to equity investments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EquityInvestmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Investments [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EquityInvestmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total Equity Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party Transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityRegistrantName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Registrant Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Borrowings</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AdministratorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Administrator</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AdministratorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Administrator [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AdministratorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Administrator</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityVoluntaryFilers_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Voluntary Filers</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Additional Paid in Capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Capital in excess of par value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Events</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Positions or Committees Responsible [Flag]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchasedDuringPeriodValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Repurchased During Period, Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchasedDuringPeriodValue_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Repurchase of shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchasedDuringPeriodValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Repurchase of shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Issuance of Common Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of shares of common stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Settlements/repayments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ForestProductsPaperSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Sector of the economy consisting of companies engaged in Forest Products &amp; Paper.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ForestProductsPaperSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Forest Products &amp; Paper Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ForestProductsPaperSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Forest Products &amp; Paper</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of quantitative information about the Level 3 fair value measurements of investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Common Stock, Shares Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityPeriodIncreaseDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stockholders' Equity, Period Increase (Decrease)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityPeriodIncreaseDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net Increase (Decrease) in Net Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EquityAndPreferredMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity and Preferred [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EquityAndPreferredMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Equity and Preferred [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EquityAndPreferredMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity and Preferred</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetAssetValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">NAV Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetAssetValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Net asset value at end of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetAssetValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Net asset value, beginning of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetAssetValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net Asset Value per Share of Common Stock at End of Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetAssetValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net asset value per common share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyExpenseRatioIncludingVoluntaryFeeWaiver_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Expense Ratio, after Voluntary Fee Waiver Deduction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyExpenseRatioIncludingVoluntaryFeeWaiver_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ratio of net expenses to average net assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Assets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Assets_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Assets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedCapitalLossCarryforward_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Distributable Earnings (Loss), Accumulated Capital Loss Carryforward</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedCapitalLossCarryforward_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-term capital loss carryforward</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statements of Operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ExpensesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of accounting policy for expenses.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ExpensesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Expenses [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ExpensesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_BankLoansMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to bank loans.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_BankLoansMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Bank Loans [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_BankLoansMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Bank Loans [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyIndemnificationDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The entire disclosure for indemnification reported by investment company.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyIndemnificationDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Indemnification Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyIndemnificationDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Indemnification</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_WeightedAverageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_WeightedAverageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted Average</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TechnologySectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Technology Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TechnologySectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">High Tech Industries [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MeasurementInputEVEBITDAMultipleMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, EV/EBITDA Multiple [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MeasurementInputEVEBITDAMultipleMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Measurement Input, EV/EBITDA Multiple [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MeasurementInputEVEBITDAMultipleMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">EV/EBITDA Multiple</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock issued ($103,000,000 and $30,000,000, respectively)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Shares, New Issues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share, Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net increase in net assets resulting from operations - diluted (in dollars per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Earnings Per Share, Diluted, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net increase in net assets resulting from operations per common share - diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SoutheastRegionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">US Southeast Region [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SoutheastRegionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Southeast</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_Security12gTitle_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Title of 12(g) Security</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueConcentrationOfRiskInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Concentration of Risk, Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueConcentrationOfRiskInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Fair value of largest investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CityAreaCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">City Area Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_SummaryOfContractualPrincipalRepaymentsAndMaturityOfInvestmentPortfolioByFiscalYearTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the tabular information of contractual principal repayments and maturity of investment portfolio by fiscal year.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_SummaryOfContractualPrincipalRepaymentsAndMaturityOfInvestmentPortfolioByFiscalYearTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Summary of Contractual Principal Repayments and Maturity of Investment Portfolio by Fiscal Year [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_SummaryOfContractualPrincipalRepaymentsAndMaturityOfInvestmentPortfolioByFiscalYearTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of contractual principal repayments and maturity of investment portfolio by fiscal year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_FairValueConcentrationOfRiskNumberOfLargestInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the number of largest customers.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_FairValueConcentrationOfRiskNumberOfLargestInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Concentration of Risk, Number of Largest Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_FairValueConcentrationOfRiskNumberOfLargestInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Number of largest investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AuditorName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Auditor Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SouthRegionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">US South Region [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SouthRegionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">South</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of selected quarterly financial data</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Quarterly Financial Information [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_FirstLienMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">First Lien [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_FirstLienMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">First Lien [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_FirstLienMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">First Lien Debt [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputCreditSpreadMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Credit Spread [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputCreditSpreadMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Spread Comparison</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyTaxReturnOfCapitalDistributionPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Tax Return of Capital Distribution, Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyTaxReturnOfCapitalDistributionPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Distributions to stockholders from return of capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyTaxReturnOfCapitalDistributionPerShare_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Distributions to stockholders from return of capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyFinancialHighlightsRollForward_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Financial Highlights [Roll Forward]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyFinancialHighlightsRollForward_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Per Share Data:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AverageInvestmentAtCost_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of average investments at cost.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AverageInvestmentAtCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Average Investment at Cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AverageInvestmentAtCost_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Average investment at cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AverageInvestmentAtCost_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Average investment amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash and Cash Equivalents, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash and Cash Equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ProceedsFromRepaymentsOfInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The cash inflow associated with the maturity and collection of all investments such as debt, security and so forth during the period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ProceedsFromRepaymentsOfInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Repayments of Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ProceedsFromRepaymentsOfInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Amount received from repayments from investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Cash and cash equivalents, end of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Cash and cash equivalents, beginning of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retained Earnings [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total Distributable (Loss) Earnings</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_FairValueConcentrationOfRiskPercentageOfInvestmentPortfolio_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the percentage of largest investments of total portfolio of investments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_FairValueConcentrationOfRiskPercentageOfInvestmentPortfolio_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Concentration of Risk, Percentage of Investment Portfolio</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_FairValueConcentrationOfRiskPercentageOfInvestmentPortfolio_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Largest investments, percentage on total portfolio investments'</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentOwnedAtFairValuePercentageOfTotalPortfolioInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the percentage of total portfolio investments for fair value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentOwnedAtFairValuePercentageOfTotalPortfolioInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Owned At Fair Value, Percentage Of Total Portfolio Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentOwnedAtFairValuePercentageOfTotalPortfolioInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of Total Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_OtherIncomeRecognitionPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of accounting policy for other income recognition.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_OtherIncomeRecognitionPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Income Recognition [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_OtherIncomeRecognitionPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Income Recognition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyTaxReclassificationIncreaseDecreaseInAccumulatedNetInvestmentIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of increase (decrease) from reclassification due to accumulated net investment income of permanent difference for distribution to ownership interest holder by investment company.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyTaxReclassificationIncreaseDecreaseInAccumulatedNetInvestmentIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Tax Reclassification, Increase (Decrease) in Accumulated Net Investment Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyTaxReclassificationIncreaseDecreaseInAccumulatedNetInvestmentIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated net investment income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_HighTechIndustriesSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Sector of the economy consisting of companies engaged in High Tech Industries.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_HighTechIndustriesSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">High Tech Industries Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_HighTechIndustriesSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">High Tech Industries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Financing Activity, Including Discontinued Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash used in financing activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in unrealized value attributable to investments still held</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_UnitrancheMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unitranche [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_UnitrancheMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Unitranche [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_UnitrancheMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unitranche Debt [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AuditorLocation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Auditor Location</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_CapitalEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Capital Equipment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_CapitalEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Capital Equipment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_CapitalEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Capital Equipment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EquityAndPreferredSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity and Preferred Shares [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EquityAndPreferredSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Equity and Preferred Shares [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EquityAndPreferredSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity and Preferred Shares [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ManagementFeePayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Management Fee Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ManagementFeePayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net base management fee due to Adviser</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments, Fair Value Disclosure</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investments fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Investments carried at fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sales</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyEffectOfEquityCapitalActivityPerShareAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">No definition available.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyEffectOfEquityCapitalActivityPerShareAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Effect of Equity Capital Activity, Per Share [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyEffectOfEquityCapitalActivityPerShareAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effect of equity capital activity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConsumerSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Consumer Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConsumerSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Services: Consumer [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityInteractiveDataCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Interactive Data Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAttributableToReportingEntityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Income (Loss), Including Portion Attributable to Noncontrolling Interest [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAttributableToReportingEntityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOtherLoans_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Other Loans</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOtherLoans_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Repayment of bank loans</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash flows from operating activities:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyDistributionToShareholdersAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Distribution to Shareholders [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyDistributionToShareholdersAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Distributions:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MeasurementInputModifiedMarketYieldMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Measurement input using modified market yield.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MeasurementInputModifiedMarketYieldMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Modified Market Yield [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MeasurementInputModifiedMarketYieldMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maturity Modified Market Yield</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InsuranceSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Insurance Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InsuranceSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Banking, Finance, Insurance &amp; Real Estate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ReceivableFromBankLoanRepayment_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of receivable from bank loan repayment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ReceivableFromBankLoanRepayment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Receivable From Bank Loan Repayment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ReceivableFromBankLoanRepayment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Receivable from bank loan repayment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NumberOfInvestmentsNonAccrualStatus_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The number of loans on non-accrual status.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NumberOfInvestmentsNonAccrualStatus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Investments Non Accrual Status</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NumberOfInvestmentsNonAccrualStatus_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of investments on non-accrual</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Equivalents, at Carrying Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash equivalent balances</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockDividendsPerShareDeclared_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Dividends, Per Share, Declared</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockDividendsPerShareDeclared_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Distributions declared per common share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Tax Identification Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfCommonStockOutstandingRollForwardTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Common Stock Outstanding Roll Forward [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfCommonStockOutstandingRollForwardTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Common Stock Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyFinancialHighlightsStatementOfAssetsAndLiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">No definition available.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyFinancialHighlightsStatementOfAssetsAndLiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Financial Highlights, Statement Of Assets And Liabilities [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyFinancialHighlightsStatementOfAssetsAndLiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statement of Assets and Liabilities Data:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AdvisorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the member information pertaining to Advisor.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AdvisorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Advisor [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AdvisorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Advisor</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Organization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyChangeInNetAssetsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyChangeInNetAssetsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Change in Net Assets [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentCompanyChangeInNetAssetsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_TaxBasisOfInvestmentsNetUnrealizedDepreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The aggregate net unrealized depreciation for all Investments in which there is an excess of tax cost over value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_TaxBasisOfInvestmentsNetUnrealizedDepreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tax Basis Of Investments Net Unrealized Depreciation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_TaxBasisOfInvestmentsNetUnrealizedDepreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net tax basis unrealized depreciation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsInNumberOfPortfolioCompanies_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents investments in the number of portfolio companies.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsInNumberOfPortfolioCompanies_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments In Number Of Portfolio Companies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InvestmentsInNumberOfPortfolioCompanies_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Investments in number of portfolio companies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net realized (loss) gain</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LocalPhoneNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Local Phone Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AuditorOpinionTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Auditor Opinion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AuditorOpinionTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Auditor Opinion [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountingPoliciesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Significant Accounting Policies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Shares, Dividend Reinvestment Plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common shares in connection with dividend reinvestment plan ($127 and $119, respectively)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestIncomeOperatingPaidInKind_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Income, Operating, Paid in Kind</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestIncomeOperatingPaidInKind_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Accretion of original issue discount interest and payment-in-kind interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyContractualFeeWaived_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Contractual Fee Waived</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyContractualFeeWaived_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Incentive fee waivers</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Emerging Growth Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_UnamortizedBalanceOfOriginalIssueDiscountInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of unamortized balance of original issue discount investments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_UnamortizedBalanceOfOriginalIssueDiscountInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unamortized Balance of Original Issue Discount Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_UnamortizedBalanceOfOriginalIssueDiscountInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unamortized balance of OID investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_OhioTransmissionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Ohio Transmission Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_CookBoardmanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cook Boardman Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ShrieveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Shrieve Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_APTHealthcareMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">APT Healthcare [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_VertellusMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Vertellus Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EnergyOilGasSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Energy Oil &amp; Gas Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AssociatedSpringsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Associated Springs [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_KeterEnvironmentalServicesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Keter Environmental Services Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_BeverageFoodTobaccoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Beverage, Food &amp; Tobacco [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_KencoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Kenco Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ApexServicePartnersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Apex Service Partners [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AerospaceDefenseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Aerospace &amp; Defense [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_SummitSpine2025Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Summit Spine 2025 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ShawMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Shaw Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PlaypowerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Playpower Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ElectricPowerEngineersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Electric Power Engineers [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_DiscoveryEducationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Discovery Education Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_O6EnvironmentalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">O6 Environmental [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_SpecializedDentalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Specialized Dental [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_CCGMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">CCG [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_SummitSpine2025Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Summit Spine 2025 Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ChemicalsPlasticsRubberSectoeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Chemicals, Plastics &amp; Rubber Sectoe [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MicroMerchantSystemsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Micro Merchant Systems Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ContainersPackagingGlassSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Containers, Packaging &amp; Glass Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_IndustrialPhysicsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Industrial Physics Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_TrystarMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Trystar Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ContainersPackagingGlassSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Containers, Packaging &amp; Glass Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ConstructionBuildingSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Construction &amp; Building Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MicroMerchantSystemsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Micro Merchant Systems Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_A1GarageDoorServiceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">A 1 Garage Door Service [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_IndustrialElectricManufacturingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Industrial Electric Manufacturing Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_O6EnvironmentalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">O6 Environmental [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_HeartlandMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Heartland Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_DenaliWaterSolutionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Denali Water Solutions Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NedStevens20222OneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Ned Stevens 20222 One [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EnvironmentalIndustriesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Environmental Industries [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_IndustrialPhysicsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Industrial Physics [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AuroraEnergyResearchMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Aurora Energy Research [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EngineTransmissionExchangeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Engine Transmission Exchange Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EncoreMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Encore [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_DenaliWaterSolutionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Denali Water Solutions Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_BetaMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Beta Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_UsalcoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Usalco [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EigbteenAndTwentyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Eigbteen And Twenty [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_HealthManagementAssociatesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Health Management Associates [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AscendMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Ascend [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AGSHealthMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">AGS Health [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AptiveEnvironmentalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Aptive Environmental Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AppliedAdhesivesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Applied Adhesives Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NedStevens20222TwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Ned Stevens 20222 Two [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_Trace3Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Trace3 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MediaradarMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Mediaradar Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ChemicalsPlasticsRubberMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Chemicals, Plastics &amp; Rubber [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_BluehaloMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Bluehalo Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_SolisMammographyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Solis Mammography [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_IvyRehabMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Ivy Rehab Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_DunBradstreetMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Dun &amp; Bradstreet [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_SPEngineeringSolutionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">SP Engineering Solutions Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_VoellerMixersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Voeller Mixers Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_LevataMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Levata [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ConstructionBuildingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Construction &amp; Building [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_StewardPartnersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Steward Partners [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_RevhealthMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Revhealth Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_LegacyServicePartnersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Legacy Service Partners [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MitratechMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Mitratech Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ShawMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shaw [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PlaskoliteMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Plaskolite Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_OhioTransmissionOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Ohio Transmission One [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_GoldenSourceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Golden Source Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MillerEnvironmentalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Miller Environmental [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_GalloMechanicalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Gallo Mechanical [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_StewardPartnersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Steward Partners Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EngineTransmissionExchangeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Engine Transmission Exchange Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_LeafHomeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Leaf Home [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EyesouthPartnersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Eyesouth Partners [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_LightBoxMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">LightBox [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_KeterEnvironmentalServicesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Keter Environmental Services Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EncoreMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Encore [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_USFootAndAnkleSpecialistsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">U.S Foot and Ankle Specialists [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AIAContractMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">AIA Contract [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_TronairMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tronair Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_VertellusMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Vertellus Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_HisshoSushiMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Hissho Sushi Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_DiscoveryEducationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Discovery Education [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AllianceEnvironmentalGroupMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Alliance Environmental Group Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ElectroMethodsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Electro Methods [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_SecretariatMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Secretariat [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_TrystarMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trystar [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_TransportationCargoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Transportation Cargo [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EyesouthPartnersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Eyesouth Partners Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AmplixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amplix [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_SPEngineeringSolutionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">SP Engineering Solutions [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_HeartlandMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Heartland [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EighteenTwentyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Eighteen Twenty [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AmerichemMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Americhem [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_GalloMechanicalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gallo Mechanical [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_GoldenSourceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Golden Source Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_RailProsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">RailPros [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_VesscoWaterMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Vessco Water [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_WhitcraftMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Whitcraft Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AIFireSafetyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">AI Fire &amp; Safety [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_VoellerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Voeller [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AmspecMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amspec Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_BrownRootMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Brown &amp; Root [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_BlueCloud2025Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Blue Cloud 2025 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_RadwellMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Radwell [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_VesscoWaterMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Vessco Water Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NvisionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Nvision [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_RFFagerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">R. F. Fager [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AerospaceDefenseSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Aerospace &amp; Defense Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MidwestEyeServicesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Midwest Eye Services [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_RailProsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">RailPros Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_OptionsItMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Options It [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MediaradarMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Mediaradar Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EagleFireMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Eagle Fire [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_BluehaloMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Bluehalo [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_FlsTransportationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Fls Transportation Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_Mb2DentalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Mb 2 Dental Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_RevhealthMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revhealth Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_IndustrialServicesGroupMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Industrial Services Group Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AmplixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amplix Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_LeafHomeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Leaf Home [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ParadigmOralHealthMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Paradigm Oral Health [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_IvyRehabMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Ivy Rehab Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_KeptCompaniesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Kept Companies [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_HealthManagementAssociatesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Health Management Associates Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_VensureMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Vensure [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_VoellerMixersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Voeller Mixers [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AOneGarageDoorServiceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">A One Garage Door Service [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ClearwayMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Clearway Pain Solutions [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ParadigmOralHealthMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Paradigm Oral Health [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_BlueCloud2025Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Blue Cloud 2025 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InsightGlobalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Insight Global Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_FlsTransportationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fls Transportation [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EighteenTwentyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Eighteen Twenty [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AppliedAdhesivesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Applied Adhesives Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_LightBoxMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">LightBox [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_LindsayPrecastMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Lindsay Precast Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InnovatemrMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Innovatemr Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ChemicalsPlasticsRubberMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Chemicals, Plastics &amp; Rubber [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_HealthcarePharmaceuticalsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Healthcare &amp; Pharmaceuticals [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_CapitalConsultantsManagementCorporationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Capital Consultants Management Corporation [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AmspecMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amspec [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PegasusMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pegasus [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_CarlisleFoodserviceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Carlisle Foodservice [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AugustaSportswearMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Augusta Sportswear Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InnovatemrMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Innovatemr Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_CerityPartnersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cerity Partners Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AGSHealthMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">AGS Health [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PrimePensionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prime Pensions [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ShrieveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shrieve Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InsightGlobalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Insight Global Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_CapitalConsultantsManagementCorporationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Capital Consultants Management Corporation [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AuroraEnergyResearchMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Aurora Energy Research [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NedStevens20222Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Ned Stevens 20222 Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_TankHoldingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tank Holding Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_HealthcarePharmaceuticalsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Healthcare &amp; Pharmaceuticals [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MindsAssemblyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Minds Assembly Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_SummitSpine2025OneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Summit Spine 2025 One [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_LevataMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Levata [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ElectricPowerEngineersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Electric Power Engineers [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InhabitMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Inhabit [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MidwestEyeServicesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Midwest Eye Services [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_BetaMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Beta Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_OhioTransmissionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Ohio Transmission [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_LindsayPrecastMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lindsay Precast [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_RFFagerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">R. F. Fager Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_SupplyHouseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">SupplyHouse [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_GmeSupplyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Gme Supply Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_Trace3Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trace3 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ApexServicePartnersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Apex Service Partners Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_LibertyGroupMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liberty Group [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AugustaSportswearMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Augusta Sportswear Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ElectroMethodsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Electro Methods [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AscendMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Ascend [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MindsAssemblyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Minds Assembly Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_BeverageFoodTobaccoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Beverage, Food &amp; Tobacco [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_LexitasMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Lexitas [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_USFootAndAnkleSpecialistsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">U.S Foot and Ankle Specialists [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AptiveEnvironmentalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Aptive Environmental [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EpicInsuranceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Epic Insurance Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_APTHealthcareMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">APT Healthcare [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AmerichemMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Americhem [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_Mb2DentalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">MB2 Dental [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_KeptCompaniesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Kept Companies Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AutomotiveSector1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Automotive Sector 1 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_TankHoldingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tank Holding Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AssociatedSpringsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Associated Springs Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ClearwayMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Clearway Pain Solutions [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MillerEnvironmentalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Miller Environmental Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NvisionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Nvision [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_VensureMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Vensure [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_RadwellMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Radwell Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_TronairMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tronair Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_BrownRootMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Brown &amp; Root Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_CherryBekaertMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cherry Bekaert Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ConstructionBuildingSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Construction &amp; Building Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EigbteenAndTwentyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Eigbteen And Twenty [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AutomotiveSector1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Automotive Sector 1 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NedStevens20222Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Ned Stevens 20222 Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AerospaceDefenseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Aerospace &amp; Defense [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PegasusMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Pegasus Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_VoellerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Voeller [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ServicesBusinessMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Services Business [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_Vc3Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Vc 3 Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_VortexCompaniesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Vortex Companies [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PrimePensionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Prime Pensions Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AerospaceDefenseSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Aerospace &amp; Defense Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EagleFireMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Eagle Fire [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NedStevens20222OneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Ned Stevens 20222 One [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_DunBradstreetMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Dun &amp; Bradstreet [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AprioMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Aprio [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_OhioTransmissionOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Ohio Transmission One [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AprioMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Aprio Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_TransportationCargoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Transportation Cargo [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InsightsoftwareMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Insightsoftware [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_A1GarageDoorServiceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">A 1 Garage Door Service Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_SummitSpine2025OneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Summit Spine 2025 One [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_CirtecMedicalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cirtec Medical Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_FrazierDeeterMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Frazier &amp; Deeter [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ConstructionBuildingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Construction &amp; Building [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ArganoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Argano Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_SequelOrthoFkaOrthoNebraskaMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sequel Ortho (fka OrthoNebraska) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_VortexCompaniesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Vortex Companies [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_Vc3Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Vc 3 Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_BurkePorterGroupMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Burke Porter Group Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_FrazierDeeterMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Frazier &amp; Deeter Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EpicInsuranceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Epic Insurance [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_TransportationCargoSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Transportation Cargo Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AIAContractMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">AIA Contract [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_SolisMammographyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Solis Mammography Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ArganoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Argano [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_UnitedComfortGroupMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">United Comfort Group Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EnvironmentalIndustriesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Environmental Industries [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AOneGarageDoorServiceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">A One Garage Door Service [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_VaxCareMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">VaxCare [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_RoverMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Rover [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EmbarkMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Embark [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EmbarkMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Embark [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_IndustrialElectricManufacturingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Industrial Electric Manufacturing [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ChemicalsPlasticsRubberSectoeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Chemicals, Plastics &amp; Rubber Sectoe [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_MitratechMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Mitratech [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_HisshoSushiMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Hissho Sushi Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_WhitcraftMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Whitcraft Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_OptionsItMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Options It Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PlaskoliteMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Plaskolite Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_SpecializedDentalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Specialized Dental Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_ServicesBusinessMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Services Business [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AllianceEnvironmentalGroupMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Alliance Environmental Group Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_TransportationCargoSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Transportation Cargo Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_RoverMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Rover Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_CherryBekaertMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cherry Bekaert [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_FMGSuiteMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">FMG Suite [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_LexitasMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lexitas [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PrecisionConceptsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Precision Concepts [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_CookBoardmanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cook Boardman Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_LibertyGroupMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Liberty Group Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_CarlisleFoodserviceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Carlisle Foodservice Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PlaypowerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Playpower Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_CCGMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">CCG [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_NedStevens20222TwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Ned Stevens 20222 Two [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_UsalcoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Usalco Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_CirtecMedicalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cirtec Medical Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_IndustrialServicesGroupMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Industrial Services Group Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_KencoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Kenco [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_CerityPartnersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cerity Partners Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_AIFireSafetyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">AI Fire &amp; Safety [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InhabitMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Inhabit [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_SecretariatMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Secretariat [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_LegacyServicePartnersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Legacy Service Partners Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_PrecisionConceptsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Precision Concepts [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_SequelOrthoFkaOrthoNebraskaMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sequel Ortho (fka OrthoNebraska) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_SupplyHouseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">SupplyHouse [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_FMGSuiteMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">FMG Suite [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_BurkePorterGroupMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Burke Porter Group Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_VaxCareMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">VaxCare Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_UnitedComfortGroupMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">United Comfort Group [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_EnergyOilGasSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Energy Oil &amp; Gas Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_GmeSupplyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gme Supply [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001633858_InsightsoftwareMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Insightsoftware Member</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MidwestRegionMember" xlink:to="us-gaap_MidwestRegionMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001633858_ScheduleOfPermanentDifferencesReclassifiedForTaxPurposesTableTextBlock" xlink:to="ck0001633858_ScheduleOfPermanentDifferencesReclassifiedForTaxPurposesTableTextBlock_lbl"/>
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          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityIncorporationStateCountryCode" xlink:to="dei_EntityIncorporationStateCountryCode_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001633858_IncreaseDecreaseInFeesDueToInvestmentAdvisor" xlink:to="ck0001633858_IncreaseDecreaseInFeesDueToInvestmentAdvisor_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityCurrentReportingStatus" xlink:to="dei_EntityCurrentReportingStatus_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingExpensesAbstract" xlink:to="us-gaap_OperatingExpensesAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel2Member" xlink:to="us-gaap_FairValueInputsLevel2Member_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:to="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromDispositionOfInvestmentOperatingActivity" xlink:to="us-gaap_ProceedsFromDispositionOfInvestmentOperatingActivity_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsTableTextBlock" xlink:to="us-gaap_InvestmentCompanyFinancialHighlightsTableTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesAuthorized" xlink:to="us-gaap_CommonStockSharesAuthorized_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" xlink:to="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001633858_InvestmentCompanyTaxReclassificationIncreaseDecreaseInAccumulatedNetRealizedGainLoss" xlink:to="ck0001633858_InvestmentCompanyTaxReclassificationIncreaseDecreaseInAccumulatedNetRealizedGainLoss_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentFiscalPeriodFocus" xlink:to="dei_DocumentFiscalPeriodFocus_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityShellCompany" xlink:to="dei_EntityShellCompany_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ContractualObligation" xlink:to="us-gaap_ContractualObligation_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAccruedLiabilitiesCurrent" xlink:to="us-gaap_OtherAccruedLiabilitiesCurrent_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001633858_ConsumerGoodsDurableSectorMember" xlink:to="ck0001633858_ConsumerGoodsDurableSectorMember_lbl"/>
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  <xsd:element id="ck0001633858_MeasurementInputModifiedMarketYieldMember" name="MeasurementInputModifiedMarketYieldMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_TelecommunicationsMember" name="TelecommunicationsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_AIFireSafetyMember" name="AIFireSafetyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
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  <xsd:element id="ck0001633858_IncentiveFeeOnCapitalGainsAsPercentOfRealizedCapitalGainsOnCumulativeBasis" name="IncentiveFeeOnCapitalGainsAsPercentOfRealizedCapitalGainsOnCumulativeBasis" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001633858_MediaAdvertisingPrintingPublishingSectorMember" name="MediaAdvertisingPrintingPublishingSectorMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_HealthcarePharmaceuticalsMember" name="HealthcarePharmaceuticalsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_RailProsMember" name="RailProsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_AssociatedSpringsMember" name="AssociatedSpringsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_UnitrancheDebtOneMember" name="UnitrancheDebtOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_UtilitiesElectricMember" name="UtilitiesElectricMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_AerospaceDefenseMember" name="AerospaceDefenseMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_ExciseTaxRate" name="ExciseTaxRate" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001633858_MillerEnvironmentalMember" name="MillerEnvironmentalMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
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  <xsd:element id="ck0001633858_StewardPartnersMember" name="StewardPartnersMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_BrownRootMember" name="BrownRootMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_UtilitiesElectricSectorMember" name="UtilitiesElectricSectorMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_AuroraEnergyResearchMember" name="AuroraEnergyResearchMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_ScheduleOfInvestmentAtFairValueByGeographicRegionTableTextBlock" name="ScheduleOfInvestmentAtFairValueByGeographicRegionTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001633858_MinimumPercentageOnInvestmentCompanyTaxableIncomeToDistributeDividends" name="MinimumPercentageOnInvestmentCompanyTaxableIncomeToDistributeDividends" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001633858_GalloMechanicalMember" name="GalloMechanicalMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_InvestmentCompanyTaxReclassificationIncreaseDecreaseInAccumulatedNetRealizedGainLoss" name="InvestmentCompanyTaxReclassificationIncreaseDecreaseInAccumulatedNetRealizedGainLoss" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001633858_PercentageOfInvestmentsAtFloatingRates" name="PercentageOfInvestmentsAtFloatingRates" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001633858_VortexCompaniesMember" name="VortexCompaniesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_VensureMember" name="VensureMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_ForestProductsPaperSectorMember" name="ForestProductsPaperSectorMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_ConstructionBuildingMember" name="ConstructionBuildingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_AdministratorMember" name="AdministratorMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_AscendMember" name="AscendMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
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  <xsd:element id="ck0001633858_BeverageFoodTobaccoMember" name="BeverageFoodTobaccoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
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  <xsd:element id="ck0001633858_SummaryOfContractualPrincipalRepaymentsAndMaturityOfInvestmentPortfolioByFiscalYearTableTextBlock" name="SummaryOfContractualPrincipalRepaymentsAndMaturityOfInvestmentPortfolioByFiscalYearTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
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  <xsd:element id="ck0001633858_PaymentsToAcquireNewInvestments" name="PaymentsToAcquireNewInvestments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
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  <xsd:element id="ck0001633858_IncreaseDecreaseInFeesDueToInvestmentAdvisor" name="IncreaseDecreaseInFeesDueToInvestmentAdvisor" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
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  <xsd:element id="ck0001633858_AGSHealthMember" name="AGSHealthMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
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  <xsd:element id="ck0001633858_ElectroMethodsMember" name="ElectroMethodsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
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  <xsd:element id="ck0001633858_TransportationCargoSectorMember" name="TransportationCargoSectorMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_UtilitiesWaterSectorMember" name="UtilitiesWaterSectorMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
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  <xsd:element id="ck0001633858_PrecisionConceptsMember" name="PrecisionConceptsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_InvestmentAdvisoryAgreementMember" name="InvestmentAdvisoryAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
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  <xsd:element id="ck0001633858_SummitSpine2025Member" name="SummitSpine2025Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
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  <xsd:element id="ck0001633858_ScheduleOfInvestmentAtFairValueBySecurityTypeTableTextBlock" name="ScheduleOfInvestmentAtFairValueBySecurityTypeTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
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  <xsd:element id="ck0001633858_PreIncentiveFeeNetInvestmentIncomeExceedHurdleOf1.765InAnyQuarter4.706AnnualizedMember" name="PreIncentiveFeeNetInvestmentIncomeExceedHurdleOf1.765InAnyQuarter4.706AnnualizedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_FeeDueToAdministrator" name="FeeDueToAdministrator" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001633858_AutomotiveSector1Member" name="AutomotiveSector1Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_OhioTransmissionOneMember" name="OhioTransmissionOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
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  <xsd:element id="ck0001633858_ConsumerMember" name="ConsumerMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_InvestmentsMaturityAndPrincipalRepaymentsAfterYearFive" name="InvestmentsMaturityAndPrincipalRepaymentsAfterYearFive" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001633858_HighTechIndustriesSectorMember" name="HighTechIndustriesSectorMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_NumberOfNewInvestments" name="NumberOfNewInvestments" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001633858_DunBradstreetMember" name="DunBradstreetMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_AOneGarageDoorServiceMember" name="AOneGarageDoorServiceMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_RelatedPartyTransactionBaseManagementFeeAnnualPercent" name="RelatedPartyTransactionBaseManagementFeeAnnualPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001633858_VoellerMember" name="VoellerMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_IncentiveFeePayableIfNoExcessIncome" name="IncentiveFeePayableIfNoExcessIncome" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001633858_TaxBasisOfInvestmentsNetUnrealizedDepreciation" name="TaxBasisOfInvestmentsNetUnrealizedDepreciation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001633858_ChemicalsPlasticsRubberSectoeMember" name="ChemicalsPlasticsRubberSectoeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_HeartlandMember" name="HeartlandMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_InvestmentAdvisoryFee" name="InvestmentAdvisoryFee" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001633858_VaxCareMember" name="VaxCareMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_SolisMammographyMember" name="SolisMammographyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_InvestmentsMaturityAndPrincipalRepaymentsYearOne" name="InvestmentsMaturityAndPrincipalRepaymentsYearOne" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001633858_FMGSuiteMember" name="FMGSuiteMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_EagleFireMember" name="EagleFireMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_EquityAndPreferredMember" name="EquityAndPreferredMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_InvestmentCompanyIndemnificationDisclosureAbstract" name="InvestmentCompanyIndemnificationDisclosureAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_RoverMember" name="RoverMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_Trace3Member" name="Trace3Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_AverageInvestmentAtCost" name="AverageInvestmentAtCost" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001633858_InvestmentsInNumberOfPortfolioCompanies" name="InvestmentsInNumberOfPortfolioCompanies" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001633858_ConsumerGoodsDurableSectorMember" name="ConsumerGoodsDurableSectorMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_USFootAndAnkleSpecialistsMember" name="USFootAndAnkleSpecialistsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_InvestmentsMaturityAndPrincipalRepaymentsYearTwo" name="InvestmentsMaturityAndPrincipalRepaymentsYearTwo" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001633858_HisshoSushiMember" name="HisshoSushiMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_HealthcarePharmaceuticalsSectorMember" name="HealthcarePharmaceuticalsSectorMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_MatrixPricingMarketAnalysisMember" name="MatrixPricingMarketAnalysisMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_EncoreMember" name="EncoreMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_UsalcoMember" name="UsalcoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_CapitalEquipmentMember" name="CapitalEquipmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_InvestmentCompanyEffectOfEquityCapitalActivityPerShareAbstract" name="InvestmentCompanyEffectOfEquityCapitalActivityPerShareAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_InsightGlobalMember" name="InsightGlobalMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_LibertyGroupMember" name="LibertyGroupMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_EmbarkMember" name="EmbarkMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_OptionsItMember" name="OptionsItMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_MeasurementInputTotalEnterpriseValueCoverageMember" name="MeasurementInputTotalEnterpriseValueCoverageMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_DisclosureOfCapitalCommitmentsMadeByInvestorToCompanyTableTextBlock" name="DisclosureOfCapitalCommitmentsMadeByInvestorToCompanyTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001633858_PeriodOfTerminationByPriorWrittenNotice" name="PeriodOfTerminationByPriorWrittenNotice" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001633858_AllianceEnvironmentalGroupMember" name="AllianceEnvironmentalGroupMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_MeasurementInputTotalLeverageMember" name="MeasurementInputTotalLeverageMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_UnitrancheMember" name="UnitrancheMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_SecondLienMember" name="SecondLienMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_NetInvestmentIncomePerShareBasic" name="NetInvestmentIncomePerShareBasic" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001633858_CerityPartnersMember" name="CerityPartnersMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_KeptCompaniesMember" name="KeptCompaniesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_RevhealthMember" name="RevhealthMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_BetaMember" name="BetaMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_ElectricPowerEngineersMember" name="ElectricPowerEngineersMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_EnergyOilGasSectorMember" name="EnergyOilGasSectorMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_WaiverAgreementMember" name="WaiverAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_AdjustmentsToCostBasisOnDebtInvestments" name="AdjustmentsToCostBasisOnDebtInvestments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001633858_CCGMember" name="CCGMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_EigbteenAndTwentyMember" name="EigbteenAndTwentyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_IndustrialPhysicsMember" name="IndustrialPhysicsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_VertellusMember" name="VertellusMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_AmplixMember" name="AmplixMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_IncentiveFeeQuarterlyHurdleRate" name="IncentiveFeeQuarterlyHurdleRate" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001633858_RFFagerMember" name="RFFagerMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_MetalsAndMiningMember" name="MetalsAndMiningMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_InvestmentsMaturityAndPrincipalRepaymentsYearThree" name="InvestmentsMaturityAndPrincipalRepaymentsYearThree" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001633858_InvestmentOwnedAtFairValuePercentageOfTotalPortfolioInvestments" name="InvestmentOwnedAtFairValuePercentageOfTotalPortfolioInvestments" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001633858_OtherUsRegionMember" name="OtherUsRegionMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_CirtecMedicalMember" name="CirtecMedicalMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_ScheduleOfTemporaryDifferencesArisingFromAmortizationOfOrganizationalExpendituresTableTextBlock" name="ScheduleOfTemporaryDifferencesArisingFromAmortizationOfOrganizationalExpendituresTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001633858_IncentiveFeeNumberOfParts" name="IncentiveFeeNumberOfParts" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001633858_ObservableInputsMember" name="ObservableInputsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_SummitSpine2025OneMember" name="SummitSpine2025OneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_InvestmentCompanyTaxDistributableLossEarnings" name="InvestmentCompanyTaxDistributableLossEarnings" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001633858_FlsTransportationMember" name="FlsTransportationMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_ParadigmOralHealthMember" name="ParadigmOralHealthMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_FirstLienMember" name="FirstLienMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_InvestmentCompanyExpenseRatioBeforeFeeWaivers" name="InvestmentCompanyExpenseRatioBeforeFeeWaivers" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001633858_InvestmentCompanyTaxReclassificationIncreaseDecreaseInCapitalInExcessOfParValue" name="InvestmentCompanyTaxReclassificationIncreaseDecreaseInCapitalInExcessOfParValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001633858_LegacyServicePartnersMember" name="LegacyServicePartnersMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_EquityAndPreferredSharesMember" name="EquityAndPreferredSharesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_InvestmentCompanyInvestmentOrdinaryIncomeLossPerShare" name="InvestmentCompanyInvestmentOrdinaryIncomeLossPerShare" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001633858_SecretariatMember" name="SecretariatMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_InhabitMember" name="InhabitMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_NumberOfInvestmentsNonAccrualStatus" name="NumberOfInvestmentsNonAccrualStatus" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001633858_VesscoWaterMember" name="VesscoWaterMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_WhitcraftMember" name="WhitcraftMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_MindsAssemblyMember" name="MindsAssemblyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_InvestmentOwnedAtCostPercentageOfTotalPortfolioInvestments" name="InvestmentOwnedAtCostPercentageOfTotalPortfolioInvestments" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001633858_APTHealthcareMember" name="APTHealthcareMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_ScheduleOfInvestmentAtFairValueByIndustryTableTextBlock" name="ScheduleOfInvestmentAtFairValueByIndustryTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001633858_SpecializedDentalMember" name="SpecializedDentalMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_AmspecMember" name="AmspecMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_HealthManagementAssociatesMember" name="HealthManagementAssociatesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_AerospaceDefenseSectorMember" name="AerospaceDefenseSectorMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_FrazierDeeterMember" name="FrazierDeeterMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001633858_DenaliWaterSolutionsMember" name="DenaliWaterSolutionsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
</xsd:schema>
