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Interest Rate Swap due on 11/15/2029 Coller Private Equity Backed Notes & Loans II-A L.P. Coller Private Equity Backed Notes & Loans II-A L.P. [Member] Coller Private Equity Backed Notes & Loans II-A L.P. Unrealized Gain (Loss), Investment, Derivative, and Foreign Currency Transaction Price Change, Operating, before Tax [Abstract] Net change in unrealized appreciation (depreciation): Investment, Issuer Name [Axis] Preferred Stock, Shares Issued Preferred stock, shares issued (in shares) Statement of Financial Position Location, Balance [Domain] Represents information pertaining to consumer finance sector. Consumer Finance Sector [Member] Consumer Finance Capital call receivable Increase Decrease in Capital Call Receivable Increase decrease in capital call receivable. Capital Call Receivable Represents information pertaining to Beacon Pointe Harmony, LLC. Beacon Pointe Harmony, LLC [Member] Beacon Pointe Harmony, LLC Worldwide Insurance Network, LLC [Member] Worldwide Insurance Network, LLC [Member] Worldwide Insurance Network, LLC Amount of dividend distribution by investment company pursuant to dividend reinvestment plan. Investment Company, Dividend Reinvestment Plan, Distribution Shares distributed pursuant to dividend reinvestment plan Represents information pertaining to THG Acquisition, LLC. THG Acquisition, LLC [Member] THG Acquisition, LLC ARMStrong Receivable Management One [Member] ARMStrong Receivable Management One ARMStrong Receivable Management One Represents information pertaining to debt investments. Debt Investments [Member] Debt Investments Operating Expenses [Abstract] Operating expenses: Financial Services Sector [Member] Financial Services Financial Services Represents information pertaining to Capital Call Facility. Capital Call Facility [Member] Capital Call Facility Fair Value, Inputs, Level 2 [Member] Level 2 Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies TA/WEG Holdings, LLC [Member] Represents information pertaining to TA/WEG Holdings, LLC. TA/WEG Holdings, LLC Investment Company, Financial Highlights [Table Text Block] Schedule of financial highlights Common Stock, Shares Authorized Common stock, shares authorized (in shares) Represents information pertaining to asset-based revolving loan facility, two "Revolver Facility". Asset Based Revolving Loan Facility, Two [Member] Revolver Facility Investment, Affiliated Issuer, Noncontrolled [Member] Non-controlled/affiliated investments Investment, Policy [Policy Text Block] Investments at Fair Value Second Lien Revolving Loan Second Lien Revolving Loan [Member] Second lien revolving loan. Debt Instrument, Interest Rate, Stated Percentage Benchmark Interest rate LENDINGTREE, INC. [Member] LENDINGTREE, INC. [Member] LendingTree, Inc Net Change in Unrealized (Appreciation) Depreciation on Translation of Assets in Foreign Currencies Net change in unrealized (appreciation) depreciation on translation of assets in foreign currencies. Net change in unrealized (appreciation) depreciation on translation of assets in foreign currencies Segment Reporting, Policy [Policy Text Block] Segment Reporting Cash and Cash Equivalent Cash and Cash Equivalent, Total Cash denominated foreign currencies included in cash and cash equivalents Cash and cash equivalents (Note 2) Onesource Merger Sub, Inc. Onesource Merger Sub, Inc. [Member] Onesource Merger Sub, Inc. Net Assets. Net assets, end of period Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3 Number of transfers into Level 3 from Level 2 Subsidiary, Sale of Stock [Line Items] Net Assets Cybersecurity Risk Management, Strategy, and Governance [Abstract] Common Stock, Shares, Issued Common stock, shares issued (in shares) Common stock issued and sold Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag] Cybersecurity Risk Board of Directors Oversight [Text Block] Asset Class [Domain] Statement [Table] Interest Receivable Non-controlled/non-affiliated investments interest receivable Investment Company, Investment Income (Loss) from Operations, Per Share Net increase (decrease) in net assets resulting from operations Net increase (decrease) in net assets resulting from operations Investment, Industry Sector [Extensible Enumeration] Investment, Industry Sector [Extensible Enumeration] Par Amount /Units Investment Owned, Balance, Principal Amount Diligent Corporation [Member] Diligent Corporation [Member] Diligent Corporation Investment, Identifier [Axis] Statement [Line Items] Revenue from Contract with Customer [Policy Text Block] Revenue Recognition Liabilities and Equity Total liabilities and net assets Debt Instrument [Line Items] Borrowings Investment Interest Rate Interest Rate Industry Sector [Axis] Summary of Investment Holdings [Line Items] Commitments and Contingencies Investments Tamarack Intermediate LLC [Member] Tamarack Intermediate LLC [Member] Tamarack Intermediate, L.L.C. Cybersecurity Risk Third Party Oversight and Identification Processes [Flag] Baker Tilly Advisory Group, L.P [Member] Baker Tilly Advisory Group, L.P. Baker Tilly Advisory Group, L.P. Revenue from External Customers by Products and Services [Table Text Block] Schedule of revenues from contracts with customers disaggregated by fee type Derivative [Line Items] Represents information pertaining to investment advisory agreement. Investment Advisory Agreement [Member] Investment Advisory Agreement Represents the information pertaining to letter agreement for second amendment. Letter Agreement for Second Amendment [Member] Second Amendment Investment, Affiliated Issuer [Member] Controlled/Affiliated - Investments Aprio Advisory Group, LLC [Member] Aprio Advisory Group, LLC [Member] Aprio Advisory Group, LLC Cybersecurity Risk Management Third Party Engaged [Flag] Coller Evergreen CFO I, L.P [Member] CollerEvergreenCFOIL.P Weighted average borrowing Weighted Average Borrowing Weighted average borrowing. Unbilled Contracts Receivable Unsettled trades receivable Geographical [Domain] This member stands for First Lien Revolving Loan One. First Lien Revolving Loan One [Member] First Lien Revolving Loan One Represents information pertaining to Arden Insurance Services LLC. Arden Insurance Services LLC [Member] Arden Insurance Services LLC Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net Net change in unrealized appreciation (depreciation) from interest rate swaps Disclosure of accounting policy related to offering costs. Offering Costs Policy [Policy Text Block] Offering Costs Unamortized financing costs Debt Issuance Costs, Net Unamortized debt issuance costs Debt Issuance Costs, Net, Total Investment Maturity Date Maturity Stock Issued During Period, Value, Dividend Reinvestment Plan Aggregate Offering Price of Company's DRIP Issuance of Common Stock pursuant to dividend reinvestment plan Investment, Variable Interest Rate, Type [Extensible Enumeration] Investment, Variable Interest Rate, Type [Extensible Enumeration] Significant Accounting Policies [Text Block] Summary of Significant Accounting Policies Vesting [Domain] Cybersecurity Risk Management, Strategy, and Governance [Table] Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of computation of basic and diluted earnings per share of Common Stock Equity Securities [Member] Equity and Warrants Equity Kona Buyer, LLC [Member] Kona Buyer, LLC. Kona Buyer, LLC Investment Company, Distribution, Ordinary Income Distributions to Stockholders from earnings Investment, Unaffiliated Issuer [Member] Non-Controlled/Non-Affiliated Investments Non-controlled/non-affiliated investments Earnings Per Share, Basic Net investment income (loss) basic Coller Capital Feeder Note B Coller Capital Feeder Note B [Member] Coller Capital Feeder Note B. Increase (Decrease) in Management Fee Payable Base management fees payable Two Thousand Twenty Eight Notes [Member] Two thousand twenty eight notes. 2028 Notes Realized Investment Gains (Losses) [Abstract] Net realized gains (losses): Director Fee Directors fees Debt, Policy [Policy Text Block] Deferred Financing and Debt Issuance Costs Total return Investment Company, Total Return Revolving Credit Facility [Member] Revolving Credit Facility Equinox Buyer LLC Equinox Buyer LLC. Equinox Buyer LLC [Member] Increase (Decrease) in Accounts Receivable Unsettled trades receivable Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash used in operating activities: Incentive Fee Expense Capital gains incentive fees Incentive fees Incentive fees (Note 3) Realized Gain (Loss), Investment and Derivative, Operating, after Tax Total net realized gains (losses) Interest Income, Deposits with Financial Institutions Interest Income, Deposits with Financial Institutions, Total Interest income from cash and cash equivalents Payments of Debt Issuance Costs Debt issuance costs Represents the increase in interest rate on debt instruments. Debt Instrument, Interest Rate, Increase Step up in interest rate Stockholders' Equity Attributable to Parent [Abstract] Net assets: Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Schedule of changes in the fair value of investments for which Level 3 inputs were used to determine the fair value General Risk Factors General Risk Factors [Member] General risk factors. Financing commitment from the lenders under the Revolving Credit Facility Line of Credit Facility, Commitment Fee Amount Valuation, Market Approach [Member] Market Transaction Distributable earnings (accumulated losses) Retained Earnings (Accumulated Deficit) Industry Sector [Domain] Subsidiary or Equity Method Investee, Sale of Stock by Subsidiary or Equity Investee [Table] This member stands for software sector. Software Sector [Member] Software Debt instrument alternate base rate Debt Instrument Alternate Base Rate Debt instrument alternate base rate. Represents information pertaining to TST Intermediate Holdings, LLC. TST Intermediate Holdings, LLC [Member] TST Intermediate Holdings, LLC Organization Amortization of Deferred Charges Amortization of deferred financing costs This member stands for First Lien Delayed Draw Term Loan. First Lien Delayed Draw Term Loan [Member] First Lien Delayed Draw Term Loan Weighted Average Number of Shares Outstanding, Diluted, Adjustment Number of dilutive shares Undistributed ordinary income Investment Company, Distributable Earnings (Loss), Accumulated Ordinary Income (Loss) Debt and Equity Securities, Realized Gain (Loss) Total net realized gains (losses) Net realized gain (loss) The amount of total fee income. Total Fee Income Total revenue from contracts with customers Total fee income NXGen Buyer, Inc. NXGen Buyer, Inc. [Member] Represents information pertaining to NXGen Buyer, Inc. Liabilities and Equity [Abstract] Liabilities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Net cash used in operating activities Low Voltage Holdings Inc. [Member] Low Voltage Holdings Inc. Low Voltage Holdings Inc. Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description Common Stock Common Stock [Member] MacKay Sposito, LLC [Member] MacKaySpositoLLC. MacKay Sposito, LLC Cybersecurity Risk Role of Management [Text Block] Represents the percentage of quarterly preferred return. Management and Service Fees, Incentive Rate, Quarterly Quarterly preferred return Preferred Equity One [Member] Preferred equity one. Preferred Equity One Dividend Income, Operating Dividend income from non-controlled/non-affiliated investments Dividend income Dividend Income, Operating, Total Dividend Income Schedule of Company's Derivative Instruments Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Debt Instrument, Interest Rate, Effective Percentage Fixed interest rate Fair Value Hierarchy and NAV [Axis] Earnings Per Share Per share information-basic and diluted: Income Tax, Policy [Policy Text Block] Income Taxes Investment Company, Investment Income (Loss) from Operations, Per Share [Abstract] Results of operations: Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag] Supplemental Cash Flow Information [Abstract] Supplemental and Non-Cash Information Foreign Currency Transactions and Translations Policy [Policy Text Block] Foreign Currency Investment, Issuer Name [Extensible Enumeration] Investment, Issuer Name [Extensible Enumeration] Statement of Financial Position Location, Balance [Axis] Management Fee Expense Management fees incurred Base management fees (Note 3) Investment Type [Axis] Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block] The amount of transfer agent and custodian fees payable as of balance sheet date. Noninterest Expense Transfer Agent and Custodian Fees Payable Sub-Administrator and the Custodian expense remained payable The entire disclosure for net assets. Assets Net [Text Block] Net Assets GC Waves Holdings, Inc. [Member] GC Waves Holdings, Inc. GC Waves Holdings, Inc. Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Represents the scenario one for increase in interest rate. Scenario One for Increase in Interest Rate [Member] Extent and for so long as the notes fail to satisfy certain investment grade rating conditions Collaborative Arrangement and Arrangement Other than Collaborative [Domain] Tranche B advance. Tranche B Advance Tranche B Advance [member] Line of Credit Facility [Table] Valuation approach using enterprise value analysis. Valuation Technique, Enterprise Value Analysis [Member] Enterprise Value Analysis Investment Income, Investment Expense Operating expenses before fee waivers Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block] First Lien Delayed Draw Term Loan Three [Member] First lien delayed draw term loan three. First Lien Delayed Draw Term Loan Three Realized Gain (Loss), Foreign Currency Transaction, before Tax Net realized (gains) losses on foreign currency transactions Vital Care Buyer LLC [Member] Vital Care Buyer LLC [Member] Vital Care Buyer LLC Represents the member information pertaining to first lien loans. First Lien Loans [Member] First Lien Loans First Lien Loans Valuation Approach and Technique [Axis] The amount of financing expenses incurred during the period. Financing Expenses, Debt Financing expenses Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Excluding Exchange Rate Effect, Including Discontinued Operation Net increase (decrease) in cash and cash equivalents This member stands for preferred equity securities. Preferred Equity Securities [Member] Preferred Equity Transfer Agent and Custodian Fees Sub-Administrator and the Custodian expense Custody and transfer agent fees Interest Income, Operating Interest Income, Operating, Total Interest income from non-controlled/non-affiliated investments Interest Income Gain (Loss) on Investments [Abstract] Net realized gains (losses) and change in unrealized appreciation (depreciation): Common Stock, Par or Stated Value Per Share Common stock, par value (in dollars per share) Anaplan, Inc [Member] Anaplan, Inc [Member] Anaplan, Inc. Payment-in-kind interest capitalized Payment in Kind Interest Capitalized Payment in kind interest capitalized. Base Rate [Member] ABR Imagine Acquisition, Inc. Imagine Acquisition, Inc. [Member] Represents information pertaining to Imagine Acquisition, LLC. Administrative Fees Expense Administrative overhead expenses Administrative expenses Schedule of Stockholders Equity [Table Text Block] Schedule of issuances of equity securities Measurement Input, EBITDA Multiple [Member] EBITDA Multiple Total expenses, net of fee waiver Total expenses, net of fee waiver Investment Company, Expense, after Reduction of Fee Waiver and Reimbursement Realized Investment Gains (Losses) Net realized gains (losses) from investment Net realized (gains) losses on investments Realized Investment Gains (Losses), Total Net realized gain (loss) Borrowings Realized and Unrealized Gain (Loss), Investment, Derivative, and Foreign Currency Transaction Price Change, Operating, before Tax Total net change in unrealized appreciation (depreciation) Investment Company, Capital Share Transaction, Increase (Decrease) Net increase in net assets resulting from capital share transactions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Purchases of investments, net Purchases (cost) Derivative, Notional Amount Notional Amount ARMStrong Receivable Management Two [Member] ARMStrongReceivableManagementTwo. ARMStrong Receivable Management Two Schedule of Long-Term Debt Instruments [Table] Valuation approach using price and other relevant information generated by recovery analysis. Valuation, Recovery Analysis [Member] Recovery Analysis Amount of payment of net debt issuance costs. Payment of net debt issuance costs Net of debt issuance costs Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Net change in unrealized appreciation/(depreciation) Represents information pertaining to Stepping Stones Healthcare Services, LLC. Stepping Stones Healthcare Services, LLC [Member] Stepping Stones Healthcare Services, LLC Floor Brokerage, Exchange and Clearance Fees Paid fee for services provided GS Acquisitionco, Inc [Member] GS Acquisitionco, Inc [Member] GS Acquistionco, Inc. Investment Company, Investment Income (Loss) Ratio Ratio of net investment income (loss) to average net assets Two Thousand Thirty Notes [Member] Two thousand thirty notes. 2030 Notes Line of Credit Facility, Remaining Borrowing Capacity Amount Available of credit facility Aggregate initial principal amount SRS Acquiom Holdings LLC [Member] SRS Acquiom Holdings LLC. SRS Acquiom Holdings LLC Fetch, Inc. Fetch, Inc. [Member] Fetch, Inc. [Member] Ownership interest or right to acquire or dispose of ownership interest in corporations and other legal entities for which ownership interest is represented by shares of common stock, convertible securities, stock rights, or stock warrants. Common Equity and Warrants Excluding Investments Measured at N A V [Member] Common Equity & Warrants Preferred Stock, Shares Outstanding Preferred stock, shares outstanding (in shares) Geographical [Axis] Investment income: Net Investment Income [Abstract] Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Realized gain (loss) on investments Cerity Partners Equity Holding LLC Cerity Partners Equity Holding LLC [Member] Cerity Partners Equity Holding LLC. Increase (Decrease) in Accrued Interest Receivable, Net Interest receivable Professional Fees Professional fees Represents information pertaining to Minotaur Acquisition, Inc. Minotaur Acquisition, Inc [Member] Minotaur Acquisition, Inc. This member stands for Unsecured Note One. Unsecured Note One [Member] Unsecured Note One Income (Loss) from Continuing Operations, Per Basic Share Net increase (decrease) in net assets resulting from operations basic Net increase (decrease) in net assets resulting from operations per share of common stock - basic Represents the second part of fee based on percentage of realized capital gains. Second Part of Fee Based on Percentage of Realized Capital Gains Second part of fee based on percentage of realized capital gains London Buyer, LLC [Member] LondonBuyerLLC. London Buyer, LLC Investment Company, Senior Security, Indebtedness, Asset Coverage Ratio Asset coverage ratio Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Outstanding balance net of unamortized financing costs Outstanding balance net of unamortized debt issuance costs Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net, Total Fair Value Measurement Inputs and Valuation Techniques [Table] Investment, Interest Rate, Paid in Kind PIK Interest Expense, Debt Interest expense Interest Expense, Debt, Total Investment Company, Capital Share Transactions [Abstract] Increase in net assets resulting from capital share transactions: Fullsteam Operations LLC [Member] Fullsteam Operations LLC. Fullsteam Operations LLC Related Party Transaction [Axis] Investment, Issuer Name [Domain] Preferred Stock, Value, Issued Preferred stock, $0.001 par value, 1,000,000 shares authorized, 0 shares issued and outstanding at June 30, 2026 and December 31, 2025 Ares Global Structured Solutions Rated Notes Feeder LLC One [Member] AresGlobalStructuredSolutionsRatedNotesFeederLLCOne Debt Instrument, Maturity Date Debt insturment maturity date Minimum [Member] Minimum [Member] Minimum Derivative Asset, Subject to Master Netting Arrangement, before Offset Gross Amount of Recognized Assets Fair Value Gross Amount of Recognized Assets Babylon Buyer Inc Member Babylon Buyer Inc Member Babylon Buyer, Inc. Cash and Cash Equivalent, Held in Foreign Currency Cash denominated in foreign currencies Fair Value, Inputs, Level 3 [Member] Level 3 Investment Company, Gain (Loss) on Investment, Per Share Net realized gains (losses) and unrealized appreciation (depreciation) Unrealized Gain (Loss) on Investments Unrealized appreciation (depreciation) Net change in unrealized (appreciation) depreciation on investments Wasteology Group Transporation LLC [Member] Wasteology Group Transporation LLC. Wasteology Group Transporation LLC Agreements and Related Party Transactions Headlands Buyer, Inc [Member] Headlands Buyer, Inc. Headlands Buyer, Inc. Management and Service Fees, Incentive Rate Annualized preferred return Shares, Outstanding Shares outstanding, end of period Commitments and Contingencies. Commitments and contingencies (Note 5) Derivative, Description of Terms Counterparty Debt Instrument, Basis Spread on Variable Rate Spread on variable rate Applicable margin Preferred Stock, Dividend Rate, Percentage Preferred Equity Investments Increase (Decrease) in Premiums Receivable Paydown receivable Foundation Risk Partners, Corp. Foundation Risk Partners, Corp. [Member] Foundation Risk Partners, Corp. Hyland Software, Inc. Hyland Software, Inc. [Member] The member stands for Hyland Software, Inc. Depreciation, Amortization and Accretion, Net Net amortization and accretion of premiums and discounts SpecialtyCare, Inc. SpecialtyCare, Inc. [Member] SpecialtyCare, Inc. RCP NATS PURCHASER LLC [Member] RCP Nats Purchaser, LLC RCP Nats Purchaser, LLC. Gain (Loss) on Derivative Instruments, Net, Pretax Gain (Loss) on Derivative Instruments, Net, Pretax, Total Interest Rate Swaps Interest and Dividend Income, Operating Total interest and dividend income Eclipse Buyer, Inc. Eclipse Buyer, Inc. [Member] Eclipse Buyer, Inc. [Member] Represents the number of transfers of financial instrument classified as an asset out of level 3 of the fair value hierarchy. Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3, Number of Transfers Number of transfers into Level 2 from Level 3 This member stands for Capital Market Sector. Capital Market Sector [Member] Capital Markets Capital Markets Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net increase (decrease) in net assets resulting from operations True Talent Advisory Borrower LLC [Member] True Talent Advisory Borrower LLC. True Talent Advisory Borrower LLC Long-Term Debt, Type [Domain] Cybersecurity Risk Management Positions or Committees Responsible [Text Block] Weighted Average Number of Shares Outstanding, Basic Weighted average shares outstanding basic Weighted average shares of common stock outstanding - basic Trintech, Inc [Member] Trintech, Inc. Trintech, Inc. Scenario [Axis] Investment, Interest Rate, Floor Floor Offering Cost, Expense Offering costs (Note 4) Offering costs incurred Represents member stands for Cherry Bekaert Advisory LLC. Cherry Bekaert Advisory LLC [Member] Cherry Bekaert Advisory LLC Minimum increase in average unused portion of commitment, expressed as a percentage of line of credit, for determination of fee for unused credit capacity under the credit facility. Line OF Credit, Minimum Increase In Unused Capacity, Commitment For Determination Of Commitment Fees, Percentage Commitment of lenders Percentage of unused portion of commitment Fair Value Measured at Net Asset Value Per Share [Member] NAV Net unrealized appreciation (depreciation) on investments Investment Company, Distributable Earnings (Loss), Accumulated Appreciation (Depreciation) Interest Payable Interest and financing fees payable Standish Management Us Llc Member Standish Management Us Llc Member Standish Management US, LLC Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block] Subsequent Events [Text Block] Subsequent Events Long-Term Debt Net Carrying Value of notes Agreements and Related Party Transactions Related Party Transactions Disclosure [Text Block] Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] Level 1 2 3 Debt Instrument, Interest Rate Terms Debt Instrument, Interest rate terms Variable Rate [Domain] Stockholders' Equity Attributable to Parent Net assets, end of period Net assets, beginning of period Net assets Total net assets Represents information pertaining to 2029 Notes. Two Thousand Twenty Nine Notes [Member] 2029 Notes Preferred Stock, Par or Stated Value Per Share Preferred stock, par value (in dollars per share) Represents information pertaining to Action Behavior Centers Therapy LLC. Action Behavior Centers Therapy LLC [Member] Action Behavior Centers Therapy LLC Basis of Accounting, Policy [Policy Text Block] Basis of Presentation This member stands for First Lien Delayed Draw Term Loan Two. First Lien Delayed Draw Term Loan Two [Member] First Lien Delayed Draw Term Loan Two Consolidated Statements of Changes in Net Assets Risks Relating to the Company's Business and Structure [Member] Risks relating to the company's business and structure. Risks Relating to the Company's Business and Structure Valuation Approach and Technique [Domain] Investment, Significant Unobservable Input [true false] Investment, Significant Unobservable Input [true false] Use of Estimates, Policy [Policy Text Block] Use of Estimates Accuserve Solutions Inc [Member] Accuserve Solutions Inc. Accuserve Solutions, Inc. Incentive Fee Payable Incentive fees payable (Note 3) Incentive fees payable Incentive Fee Payable, Total Fair Value Disclosures [Text Block] Fair Value of Investments Dividends Receivable Non-controlled/non-affiliated investments dividends receivable Investment Owned, at Fair Value Fair Value Investments, at fair value Fair value at December 31, 2024 Fair value at September 30, 2025 UNITED STATES United States U.S. Truist Facility [Member] Truist facility. Truist Facility Risks Relating to the Company's Investments [Member] Risks relating to the company's investments. Risks Relating to the Company's Investments Debt Instrument, Name [Domain] Measurement Input, Discount Rate [Member] Discount Rate Prepaid Expense and Other Assets Prepaid expenses and other assets Derivative Instruments and Hedging Activities Disclosure [Abstract] Ownership interest or right to acquire or dispose of ownership interest in corporations and other legal entities for which ownership interest is represented by shares of common stock, convertible securities, stock rights, or stock warrants. Common Equity and Warrants [Member] Common Equity and Warrants Common Equity & Warrants Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair value hierarchy Wharf Street Ratings Acquisition Llc Member Wharf Street Ratings Acquisition Llc Member Wharf Street Ratings Acquisition LLC Credit Facility [Axis] Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Text Block] Schedule of Investments [Line Items] Consolidated Schedule of Investments The amount of other temporary differences in an investment company. Investment Company, Other Temporary Differences Other temporary differences Cybersecurity Risk Management Expertise of Management Responsible [Text Block] Short-Term Debt, Weighted Average Interest Rate, over Time Interest rate on floating rate credit facilities Represents information pertaining to Choreo Buyer, LLC. Choreo Buyer LLC [Member] Choreo Buyer LLC. Proceeds from Sales and Maturities of Investments Proceeds from sales and maturities of investments. Sales and repayments of investments, net Investment Income [Table] Investment, Issuer Affiliation [Domain] Preferred Equity PIK Preferred Equity Investment Interest Rate Paid In Kind Preferred Equity Investment Interest Rate Paid In Kind Technology Hardware, Storage & Peripherals Technology Hardware, Storage and Peripherals [Member] Technology hardware, storage and peripherals. Number of Reportable Segments Number of Reportable Segments EURIBOR Euro Interbank Offered Rate [Member] Euro interbank offered rate. Credit Facility [Domain] Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] Long-Term Debt, Gross Outstanding balance First Amendment Date [Member] First Amendment Date. First Amendment Date Deferred Offering Costs Deferred offering expenses Debt, Weighted Average Interest Rate Interest rate on floating rate credit facilities Represents information pertaining to HBWM Intermediate II, LLC. HBWM Intermediate II, LLC [Member] HBWM INTERMEDIATE II, LLC Net of deferred financing costs Debt Issuance Costs, Current, Net Debt Issuance Costs, Current, Net, Total Professional Fees Waivers Professional fees waivers Professional fees waivers Represents information pertaining to MB2 Dental Solutions, LLC. MB2 Dental Solutions, LLC [Member] MB2 Dental Solutions, LLC Measurement Input Type [Domain] Investment, Acquisition Date Acquisition Date Investment, Issuer Affiliation [Extensible Enumeration] Investment, Issuer Affiliation [Extensible Enumeration] Investment Owned, at Cost Cost Amortized cost Purchases (cost) Applicable Margin For Advances Applicable margin for advances. Applicable margin for advances Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Cash and cash equivalents, end of period Cash and cash equivalents, beginning of period Accounts Payable and Accrued Liabilities Accounts payable and accrued expenses Interest Paid, Excluding Capitalized Interest, Operating Activity Cash paid during the period for interest Statistical Measurement [Domain] Percentage of securities held as collateral at fair value. Percentage Of Securities Held As Collateral At Fair Value Percentage of net assets Summary of Investment Holdings [Table] Captive Resources Midco, LLC [Member] Captive Resources Midco, LLC [Member] Captive Resources Midco, LLC Management and Service Fees, Base Rate Base management fee as percentage of average value of gross assets Ares Global Structured Solutions Rated Notes Feeder LLC [Member] AresGlobalStructuredSolutionsRatedNotesFeederLLC. Fair Value Hierarchy and NAV [Domain] Heights Buyer Llc Member Heights Buyer Llc Member Heights Buyer, LLC Line of Credit Facility, Commitment Fee Percentage Commitment fee at a rate Investment, Issuer Affiliation [Axis] Ministry Brands Holdings, LLC Ministry Brands Holdings Llc Member Ministry Brands Holdings Llc Member IG Investments Holdings, LLC [Member] IG Investments Holdings, LLC [Member] IG Investments Holdings, LLC Debt Instrument, Description of Variable Rate Basis Description of variable rate basis Fee Income Fee income Fee Income Consolidated Statements of Assets and Liabilities Represents the number of parts of incentive fees. Number of Parts of Incentive Fees Number of parts of incentive fees Titan Home Improvement, LLC [Member] Titan Home Improvement, LLC [Member] Titan Home Improvement, LLC Vesting [Axis] Represents information pertaining to NextGen Healthcare. NextGen Healthcare [Member] NextGen Healthcare SPV CA IX, LLC [Member] SPV CA IX, LLC. SPV CA IX, LLC The amount payable related to organizational and offering expenses as of balance sheet date. Organizational and Offering Expenses Payable Balance payable for offering expenses Organizational and offering expenses payable The tabular disclosure of interest and financing costs. Debt Instrument, Interest and Financing Costs [Table Text Block] Summary of interest and financing costs Represents the member information pertaining to affiliated broker dealer. Affiliated Broker Dealer [Member] Affiliated Broker-Dealer Represents the information related to Petra Borrower, LLC. Petra Borrower, LLC [Member] Petra Borrower, LLC New Mountain Guardian IV Rated Feeder III Ltd Member New mountain guardian IV rated feeder III ltd. New Mountain Guardian IV Rated Feeder III, Ltd. Cybersecurity Risk Management, Strategy, and Governance [Line Items] Liabilities Total liabilities Represents information pertaining to Alkeme Intermediary Holdings, LLC. Alkeme Intermediary Holdings, LLC [Member] Alkeme Intermediary Holdings, LLC Schedule of Fair Value, off-Balance-Sheet Risks [Table Text Block] Schedule of unfunded portfolio company commitments under loan and financing agreements No definition available. Investment Company, Distribution to Shareholders, Per Share [Abstract] Distributions to Common Stockholders Redwood Purchaser, INC Redwood Purchaser INC [Member] Redwood purchaser Inc. Variable Rate [Axis] Mri Software Llc Member Mri Software Llc Member MRI Software LLC Represents information pertaining to sub-administration agreement. Sub-administration Agreement [Member] Sub-administration agreement Weighted Average Number of Shares Outstanding, Diluted Weighted average shares outstanding diluted Weighted average shares of common stock outstanding - diluted Unrealized Gain (Loss), Investment and Derivative, Operating, after Tax Total net change in unrealized appreciation (depreciation) Measurement Input Type [Axis] Increase (Decrease) in Accounts Payable and Accrued Liabilities Accounts payable and accrued expenses Kwol Acquisition, Inc. [Member] Represents information pertaining to Kwol Acquisition, Inc. Kwol Acquisition, Inc Investments [Domain] Securities Held as Collateral, at Fair Value Fair value of net asset Derivative Instruments and Hedging Activities Disclosures [Table] Scenario [Domain] Represents information pertaining to asset-based revolving loan facility, one "ABL Facility". Asset Based Revolving Loan Facility, One [Member] ABL Facility Number of Operating Segments Number of Operating Segment Sale of Stock [Domain] Project K BuyerCo, Inc. Project K BuyerCo, Inc. [Member] Project K Buyerco, INC. Represents information pertaining to GoneZero Financial Systems, LLC. oneZero Financial Systems, LLC [Member] oneZero Financial Systems, LLC Accounts Receivable, Noncurrent, Accrued Interest, after Allowance for Credit Loss Paydown receivable This member stands for First Lien Delayed Draw Term Loan One. First Lien Delayed Draw Term Loan One [Member] First Lien Delayed Draw Term Loan One Dividends Declared [Table Text Block] Schedule of distributions declared and paid Real Estate Sector [Member] Real Estate Management & Development MAI Capital Management Intermediate LLC [Member] MAI Capital Management Intermediate LLC [Member] MAI Capital Management Intermediate LLC Second Lien Delayed Draw Term Loan Second Lien Delayed Draw Term Loan [Member] This member stands for Second Lien Delayed Draw Term Loan. Entertainment Entertainment [Member] Galway Borrower, LLC [Member] Galway Borrower, LLC [Member] Galway Borrower LLC Debt Instrument, Interest Rate, Increase (Decrease) Step up in interest rate Increase rate of borrowings Redwood Services Group LLC [Member] Redwood services group Llc. Redwood Services Group, LLC Schedule of Investments [Table] New Accounting Pronouncements, Policy [Policy Text Block] Recent Accounting Pronouncements Ratio of total operating expenses to average net assets Investment Company, Operating Expenses To Average Net Assets Investment company, operating expenses to average net assets. Simplifi Holdings, Inc. Simplifi Holdings, Inc. [Member] Simplifi Holdings, Inc. Payment for Purchase, Investment, Operating Activity Purchases of investments Investment Company, Dividend Distribution Distribution Paid Investment Company, Dividend Distribution, Total Net decrease in net assets resulting from stockholder distributions Exeter Short Term Funding LLC Exeter Short Term Funding Llc Member Exeter Short Term Funding Llc Member Amount of capital gain and loss. Investment Capital Gain Loss Capital losses Investment Company, Portfolio Turnover Portfolio turnover This member stands for First Lien Revolving Loan. First Lien Revolving Loan [Member] First Lien Revolving Loan Investment, Type [Extensible Enumeration] Investment, Type [Extensible Enumeration] Investment Company Nonqualifying Assets Percentage Investment company nonqualifying assets percentage. Non-qualifying assets as a percentage of total assets Common Stock, Shares, Outstanding Common stock, shares outstanding (in shares) Common shares outstanding at the end of the period (in shares) Insurance expense Insurance Commissions Cybersecurity Risk Management Processes Integrated [Flag] Valuation Technique, Discounted Cash Flow [Member] Discounted Cash Flow Consolidated Schedule of Investments Unrealized Gain (Loss) on Derivatives Unrealized Appreciation / (Depreciation) Net change in unrealized (appreciation) depreciation on interest rate swaps Net realized (gains) losses on interest rate swaps Statement of Cash Flows [Abstract] The amount of administrative overhead expenses remained payable as of balance sheet date. Administrative Fees Expense Payable Administrative overhead expenses remained payable Provision for federal taxes Current Federal Tax Expense (Benefit) Stock Issued During Period, Value, New Issues Issuance of shares of Common Stock Net Proceeds Interest Rate Swap [Member] Interest rate swaps Interest Rate Swaps Incentive Fee Payable, Capital-Gain-Based Capital gains incentive fee payable Earnings Per Share [Text Block] Earnings Per Share Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Fair value, end of period Fair value, beginning of period Cybersecurity Risk Management Processes Integrated [Text Block] Investment Income, Operating, after Expense and Tax Net investment income (loss) Net increase (decrease) in net assets resulting from operations Net increase (decrease) in net assets resulting from operations Accordion Partners LLC Accordion Partners LLC [Member] Accordion Partners LLC Flexera Software LLC Flexera Software LLC [Member] Flexera Software LLC. Investment, Basis Spread, Variable Rate Spread KRIV Acquisition Inc. KRIV Acquisition Inc. [Member] Represents information pertaining to KRIV Acquisition Inc. PAS Parent, Inc. PAS Parent Inc. PAS Parent, Inc. [Member] Represents information pertaining to PAS Parent, Inc. Ownership interest or right to acquire or dispose of ownership interest in corporations and other legal entities for which ownership interest is represented by shares of preferred stock. Preferred Equity [Member] Preferred Equity Line of Credit Facility [Line Items] Credit facility Net change in unrealized (appreciation) depreciation on translation of assets in foreign currencies Unrealized translation gain/(loss) on borrowings Translation of assets and liabilities in foreign currencies Net unrealized appreciation on the translation of assets and liabilities in foreign currencies Accounts Payable, Trade Unsettled trades payable This member stands for health care technology sector. Health Care Technology Sector [Member] Health Care Technology Assets [Abstract] Assets: Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other assets Bottomline Technologies, Inc. Bottomline Technologies, Inc. [Member] Bottomline Technologies, Inc. Debt Instrument, Measurement Input Debt AKAM Buyer, Inc. [Member] AKAM Buyer, Inc. AKAM Buyer, Inc. Measurement input using market transaction. Measurement Input Market Transaction [Member] Market Transaction Other Assets [Member] Other Assets Equity investments Equity Securities, FV-NI, Measurement Input This member stands for equity securities other than warrants. Equity Securities Other Than Warrants [Member] Equity Common Equity GovDelivery Holdings, LLC [Member] GovDelivery Holdings, LLC [Member] GovDelivery Holdings, LLC Saab Purchaser, Inc [Member] Saab Purchaser, Inc. Saab Purchaser, Inc Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Investments Maturity Date Derivative, Contract End Date Derivative, Basis Spread on Variable Rate Derivative Spread Variable Rate Floating interest rate of SOFR Unrealized Gain (Loss) on Investments [Table Text Block] Schedule of net change in unrealized appreciation (depreciation) for the Level 3 investments that were still held Represents information pertaining to 2025 Notes. Two Thousand Twenty Five Notes [Member] 2025 Notes KRESA Sub Merger, Inc. [Member] KRESA Sub Merger, Inc. KRESA Sub Merger, Inc. Net Investment Income Net investment income (loss) Fair Value of Investments Commitments and Contingencies Investment Company, Distribution to Shareholders, Per Share Distribution Rate per Share Distributions from earnings Investment Owned, Percent of Net Assets Percentage of Net Assets Long-Term Line of Credit Net Carrying Value of credit facility Long-Term Line of Credit, Total Revolving credit facilities payable (net of deferred financing costs of $9,646 and $8,551, respectively) (Note 7) Derivative Instrument [Axis] Derivative Instruments Derivative Financial Instruments, Assets [Member] Offering Costs Disclosure [Text Block] The entire disclosure of offering costs. Offering Costs Represents information pertaining to Cliffwater, LLC. Cliffwater, LLC [Member] Cliffwater, LLC Sale of Stock [Axis] World Insurance Associates, LLC World Insurance Associates LLC [Member] World insurance associates LLC. Private Placement [Member] Private placement offerings Open Swap Contract, Identifier [Axis] Fed Funds Effective Rate Overnight Index Swap Rate [Member] Federal funds effective rate LendDirect Trust [Member] LendDirectTrust. LendDirect Trust Derivative Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3 Number of transfers out of Level 3 Income Tax Disclosure [Text Block] Taxes The amount of adjustment for permanent book to tax differences in an investment company. Investment Company, Adjustment for Permanent Book to Tax Differences Adjustment for permanent book to tax differences Second Lien Loans Second Lien Loans Represents the member information pertaining to second lien loans. Second Lien Loans [Member] Distributions [Policy Text Block] Distributions to Common Stockholders Reinvestment of Distributions Pursuant to Dividend Reinvestment Plan Reinvestment of distributions pursuant to dividend reinvestment plan. Reinvestment of distributions pursuant to dividend reinvestment plan during the period Represents information pertaining to Imagine Acquisitionco, LLC. Imagine Acquisitionco, LLC [Member] Imagine Acquistionco, Inc. Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Represents information pertaining to Belmont Buyer, Inc. Belmont Buyer, Inc. [Member] Belmont Buyer, Inc. New Mountain Guardian Iv Income Rated Feeder Ii Ltd Member New Mountain Guardian Iv Income Rated Feeder Ii Ltd Member New Mountain Guardian IV Income Rated Feeder II, Ltd. Accrued Professional Fees Transfer agent expense remained payable Income Tax Disclosure [Abstract] Fair Value, Recurring and Nonrecurring [Table] Unsecured Notes One [Member] Unsecured notes one. Unsecured Notes One Senior Notes [Member] Senior Notes Bellwether Buyer, LLC [Member] Bellwether Buyer, LLC. Bellwether Buyer, LLC The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt. Deferred financing costs Deferred financing costs Debt and Equity Securities, Unrealized Gain (Loss) Debt and Equity Securities, Unrealized Gain (Loss), Total Net unrealized gain (loss) Non-controlled/non-affiliated investments/ Controlled /affiliated investments Schedule of Related Party Transactions, by Related Party [Table] Proceeds from Notes Payable Proceeds from issuance of debt Borrowings of Notes Proceeds from Notes Payable, Total Flow Traders Holding, LLC [Member] Flow Traders Holding, LLC. Flow Traders Holding, LLC Financial Highlights Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Cash flows from financing activities: Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Unused commitment fee (as a percent) Commitment fee Payscape Buyer, Inc. Payscape Buyer, Inc [Member] Payscape Buyer, Inc. Fair Value Measurement Inputs and Valuation Techniques [Line Items] Quantitative information about the significant unobservable inputs of Level 3 investments Total interest and financing expenses Interest and Debt Expense Interest and other debt expenses Mirra-Prime Access Holdings, LLC Mirra-Prime Access Holdings, LLC [Member] MIRRA-PRIMEACCESS Holdings, LLC Equity Components [Axis] Investment Company, Investment Income (Loss) Ratio, before Incentive Allocation Ratio of net investment income to average net assets, excluding effect of professional fee waiver Equity Component [Domain] Asset Class [Axis] Investment Company, Financial Highlights [Text Block] Financial Highlights Disclosure of accounting policy related to Dividend Reinvestment Plan. Dividend Reinvestment Plan [Policy Text Block] Dividend Reinvestment Plan Mercer Advisors Mercer Advisors [Member] Mercer Advisors. Investment Company, Investment Income (Loss), Per Share, Basic Net investment income Investment Company, Investment Income (Loss), Per Share, Total Derivative, Fair Value, Net Derivative, Fair Value, Net, Total Unrealized Appreciation / (Depreciation) Recovery Rate Measurement input using recovery rate. Measurement Input Recovery Rate [Member] This member stands for Unsecured Note Two. Unsecured Note Two [Member] Unsecured Note Two Increase (Decrease) in Dividends Receivable Dividends receivable Net Investment Income [Line Items] Net Assets MEDX HOLDINGS, LLC [Member] MEDX Holdings, LLC MEDX Holdings, LLC. Net Change In Unrealized Appreciation (Depreciation) From Interest Rate Swaps Net Change In Unrealized Appreciation (Depreciation) From Interest Rate Swaps Net change in unrealized appreciation (depreciation) from interest rate swaps Maximum [Member] Maximum [Member] Maximum Statistical Measurement [Axis] Common Stock, Value, Issued Common stock, $0.001 par value, 250,000,000 shares authorized, 71,049,058 and 69,072,088 shares issued and outstanding at June 30, 2026 and December 31, 2025, respectively Represents information pertaining to administration agreement. Administration Agreement [Member] Administration Agreement SAM Holding Company, Inc [Member] SAMHoldingCompanyInc. SAM Holding Company, Inc. Derivative, Fixed Interest Rate Fixed Interest Rate Consolidation, Policy [Policy Text Block] Consolidation Healthcare Sector [Member] Health Care Providers & Services Capital commitments Investment Company, Committed Capital Income (Loss) from Continuing Operations, Per Diluted Share Net increase (decrease) in net assets resulting from operations diluted Net increase (decrease) in net assets resulting from operations per share of common stock - diluted Represents information pertaining to transfer agent servicing agreement. Transfer Agent Servicing Agreement [Member] Transfer agent servicing agreement Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block] Gain (Loss) on Sale of Derivatives Net realized gain (loss) on derivatives Net realized (gains) losses on interest rate swaps Investment Company, Financial Ratios [Abstract] Ratio/Supplemental data: Amortization of Debt Issuance Costs Amortization of debt issuance costs Professional Services This member stands for professional services sector. Professional Services Sector [Member] Continental Buyer Inc. Continental Buyer Inc.[Member] Continental Buyer Inc. [Member] No definition available. Net Assets Securities Investment Securities Investment [Member] Preferred Stock, Shares Authorized Preferred stock, shares authorized (in shares) Schedule of Debt [Table Text Block] Summary of outstanding debt Represents the scenario two for increase in interest rate. Scenario Two for Increase in Interest Rate [Member] Extent and for so long as either the ratio of the Company's secured debt to total assets exceeds specified thresholds Investment Company, Expense Ratio Including Incentive Fee Ratio of operating expenses to average net assets Related Party Transaction [Line Items] Agreements and Related Party Transactions Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Debt Disclosure [Text Block] Borrowings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net Transfers in (out) of Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net, Total Transfers in (out) TRAK Purchaser, Inc [Member] TRAK Purchaser, Inc. TRAK Purchaser, Inc No definition available. Offering Costs Additional Paid in Capital Paid in capital in excess of par Represents information pertaining to Trinity Partners Holdings LLC. Trinity Partners Holdings LLC [Member] Trinity Partners Holdings, LLC Subsequent Events Amount of increase (decrease) interest and financing fees payable. Increase decrease interest and financing fees payable Interest and financing fees payable Cybersecurity Risk Management Positions or Committees Responsible [Flag] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Changes in the fair value of investments for which Level 3 inputs were used to determine the fair value Net Change in Unrealized Appreciation (Depreciation) Investment, Affiliated Issuer, Controlled [Member] Controlled/affiliated investments Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] SOFR Foreign currency transactions Realized Gain (Loss), Foreign Currency Transaction, after Tax Net realized losses on foreign currency transactions Proceeds from Issuance of Common Stock Gross proceeds Proceeds from issuance of shares of Common Stock Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Schedule of significant unobservable inputs This member stands for Consumer Finance. Consumer Finance [Member] Consumer Finance Amortization Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Amortization Fair value, measurement with unobservable inputs reconciliation, recurring basis, asset, amortization. Stockholders' Equity, Period Increase (Decrease) Total increase in net assets Net asset value per share (in dollar per share) Net asset value, beginning of period Net asset value, end of period Net asset value per share of Common Stock Assets Total assets Consolidated Statements of Operations TRAKAmerica TRAKAmerica [Member] TRAKAmerica. Weighted Average [Member] Weighted Average [Member] Technology Sector [Member] IT Services Stock Issued During Period, Shares, New Issues Number of Common Stock Issued Investment, Issuer Geographic Region [Extensible Enumeration] Investment, Issuer Geographic Region [Extensible Enumeration] Southpaw AP Buyer, LLC Southpaw AP Buyer, LLC [Member] Southpaw AP Buyer, LLC Earnings Per Share, Diluted Net investment income (loss) diluted Financing Receivable, Nonaccrual Investments were on non-accrual This member stands for Unsecured Note. Unsecured Note [Member] Unsecured Note Unsecured Notes Increase (Decrease) in Accounts Payable, Trade Unsettled trades payable New or Modified Laws or Regulations [Member] New or modified laws or regulations. New or Modified Laws or Regulations Interest Rate Swap due on April Ten Two Thousand Twenty Nine [Member] Interest Rate Swap due on April Ten Two Thousand Twenty Nine [Member] Interest Rate Swap Due on 4/10/2029 Represents information pertaining to Guardian Restoration Partners Buyers, LLC. Guardian Restoration Partners Buyers, LLC [Member] Guardian Restoration Partners Buyers, LLC Skywalker Purchaser, LLC Skywalker Purchaser, LLC [Member] Skywalker Purchaser, LLC. Proceeds from Lines of Credit Borrowings under revolving credit facilities Debt Instrument, Face Amount Outstanding Principal of notes Aggregate principal amount Represents members stands for ARMStrong Receivable Management. ARMStrong Receivable Management [Member] ARMStrong Receivable Management Line of Credit Facility, Maximum Borrowing Capacity Aggregate Principal Committed of credit facility Maximum borrowing capacity Maximum borrowing capacity Amount of noninterest expense (benefit) transfer agent and custodian fees. Noninterest Expense (Benefit) Transfer Agent And Custodian Fees Transfer agent (benefit) expense Increase (Decrease) in Deferred Charges Deferred offering expenses Net decrease in net assets resulting from distributions Investment Company, Tax Return of Capital Distribution, Per Share Beacon Global Strategies LLC [Member] BeaconGlobalStrategiesLLC. Beacon Global Strategies LLC Derivative Liability, Subject to Master Netting Arrangement, before Offset Gross Amount of Recognized Liabilities Gross Amount of Recognized Liabilities Represents information pertaining to TA/WEG Intermediate Holdings, LLC. TA/WEG Intermediate Holdings, LLC [Member] TA/WEG Intermediate Holdings, LLC Investments Cash and Cash Equivalents, Policy [Policy Text Block] Cash and Cash Equivalents Propio LS, LLC Propio LS, LLC [Member] Propio LS, LLC. Conservice Midco LLC [Member] Conservice Midco LLC. Conservice Midco LLC New Mountain Capital LLC. [Member] New Mountain Capital LLC [Member] New Mountain Capital LLC Archduke Buyer, Inc. Archduke Buyer, Inc. [Member] Archduke Buyer, Inc. Investment Company, Financial Support to Investee Contractually Required, Not Provided, Amount Unfunded portfolio company commitments Schedule of Derivative Instruments Included in Trading Activities [Table Text Block] Schedule of Net Realized and Unrealized Gain (Loss) on Derivative Instruments The Chartis Group, LLC The Chartis Group, LLC [Member] The Chartis Group, LLC. Disclosure of accounting policy related to Net Realized Gains or Losses and Net Change in Unrealized Appreciation or Depreciation. Net Realized Gains or Losses and Net Change in Unrealized Appreciation or Depreciation [Policy Text Block] Net Realized Gains or Losses and Net Change in Unrealized Appreciation or Depreciation Financing Interest Expense Interest and financing fees (Note 7) Represents the first part of fee based on percentage of pre-incentive fee net investment income. First Part Of Fee Based On Percentage Of Pre-Incentive Fee Net Investment Income First part of fee based on percentage of pre-incentive fee net investment income Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Net cash provided by financing activities Represents the percentage of total portfolio investments for fair value. Investment Owned At Fair Value, Percentage Of Total Portfolio Investments Total Percent of Total Investments at Fair Value Notes Payable Notes payable (net of debt issuance costs of $4,398 and $4,988, respectively) (Note 7) Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) Net change in unrealized appreciation/(depreciation) Total Summary Investment Holdings [Table Text Block] Schedule of composition of investment portfolio Management Fee Payable Base management fees payable (Note 3) Base management fees payable Secured Debt [Member] Secured Credit Facility Increase (Decrease) in Incentive Fee Payable Incentive fees payable Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales Proceeds from sales and principal payments, net Sales and paydowns Derivative Contract [Domain] Non-US [Member] Non-U.S. Consumer Sector [Member] Diversified Consumer Services Diversified Consumer Services Represents information pertaining to AmeriLife Holdings LLC. AmeriLife Holdings LLC [Member] Amerilife Holdings LLC Net Income (Loss), Including Portion Attributable to Noncontrolling Interest [Abstract] Increase (decrease) in net assets resulting from operations: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Cash flows from operating activities: Repayments of Lines of Credit Payments on revolving credit facilities Investment Company, Distribution to Shareholders [Abstract] Decrease in net assets resulting from stockholder distributions: Paid-in-Kind Interest PIK interest (cost) Insurance Sector [Member] Insurance More Cowbell II LLC More Cowbell II Llc [Member] More Cowbell II LLC Amount of net accretion of discount and amortization of investments from asset measured at fair value on recurring basis using unobservable input (level 3). Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Net Accretion of Discount and Amortization of Investments Net accretion of discount and amortization of investments Omega Systems Intermediate Holdings INC [Member] Omega systems intermediate holdings Inc. Omega Systems Intermediate Holdings, INC Represents the information pertaining to letter agreement for fourth amendment. Letter Agreement For Fourth Amendment [Member] Fourth Amendment Elkay LLC Elkay LLC [Member] Elkay LLC Line of Credit Facility, Current Borrowing Capacity Outstanding Principal of credit facility Per Share Represents information pertaining to Acentra Holdings, LLC. Acentra Holdings, LLC [Member] Acentra Holdings, LLC Repayments of Notes Repayments of Notes Payable Long-Term Debt, Type [Axis] Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block] Schedule of fair value hierarchy Debt Instrument, Term Maturity date of debt instrument Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Organization Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Realized gain (loss) on investments Related Party Transaction [Domain] Portage Point Partners, LLC [Member] PortagePointPartnersLLC. Portage Point Partners, LLC Gross Investment Income, Operating Total investment income Debt Securities, Realized Gain (Loss) Total net realized (gains) losses Non-controlled/non-affiliated investments Disclosure of accounting policy for net asset value per common shares. Net Asset Value Per Common Shares, Policy [Policy Text Block] Net Asset Value per Common Share Summary of Significant Accounting Policies Stock Issued During Period, Shares, Dividend Reinvestment Plan Number of Common Stock Issued in the Company's DRIP Interest Income, Operating, Paid in Kind Payment-in-Kind interest income from non-controlled/non-affiliated investments Payment in kind The amount of capital commitments unfunded. Capital Commitments Unfunded Capital commitments unfunded Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Paid Distributions paid in cash Represents information pertaining to Orion Advisor Solutions, LLC. Orion Advisor Solutions, LLC [Member] Orion Advisor Solutions, LLC Redwood Trust, Inc [Member] Redwood Trust, Inc. Redwood Trust, Inc. Alternate Base Rate Member Person with designation of chief compliance officer. Second Lien Term Loan Member Chief Compliance Officer [Member] Alternate Base Rate Member First Lien Term Loan Member First Lien Term Loan Member Second Lien Term Loan Member EuroInter bank offer rate. EuroInter Bank Offer Rate [Member]