Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Trading Arrangement: Trading Arrangement [Axis] Minimum hedge percentage Debt Covenants, Minimum Hedge Percentage Debt Covenants, Minimum Hedge Percentage Maximum Maximum [Member] Loans with fair value classified as non-accrual Investment Owned, At Fair Value, Non-Accrual Investment Owned, At Fair Value, Non-Accrual Statistical Measurement [Domain] Statistical Measurement [Domain] Document Fiscal Year Focus Document Fiscal Year Focus Weighted average interest rate Debt, Weighted Average Interest Rate Adjustment to Compensation, Amount Adjustment to Compensation Amount Financial Instrument [Axis] Financial Instrument [Axis] Net increase in dividend and interest receivables Increase (Decrease) in Interest and Dividends Receivable Segment Reporting [Abstract] Year 6 Management Fee, Period Six [Member] Management Fee, Period Six Line of Credit Line of Credit [Member] Restatement Determination Date Restatement Determination Date Brick Dynamics Inc. Brick Dynamics Inc. [Member] Brick Dynamics Inc. Amendment Flag Amendment Flag Vitable, Inc. Vitable, Inc. [Member] Vitable, Inc. Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Net investment income (loss) Net Investment Income Contributions from shareholder Proceeds from Contributed Capital Variable Rate Component [Axis] Variable Rate Component [Axis] Variable Rate Component Investments [Domain] Investments [Domain] Creoate Limited Creoate Limited [Member] Creoate Limited MANAGEMENT FEE AND RELATED PARTIES Related Party Transactions Disclosure [Text Block] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Entity Address, State or Province Entity Address, State or Province PEO Total Compensation Amount PEO Total Compensation Amount Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Fortull, Inc. Fortull, Inc. [Member] Fortull, Inc. Weighted average shares outstanding, basic (in shares) Weighted Average Number of Shares Outstanding, Basic Schedule of Management Fees Schedule of Related Party Transactions [Table Text Block] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Number of reportable segments Number of Reportable Segments WTI Fund XI, LLC WTI Fund XI, LLC [Member] WTI Fund XI, LLC Entity Address, City or Town Entity Address, City or Town Average debt outstanding Long-Term Debt, Average Amount Outstanding Statement of Financial Position [Abstract] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Level 2 Fair Value, Inputs, Level 2 [Member] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Net investment income (loss) (in dollars per share) Investment Company, Investment Income (Loss), Per Share, Basic Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Interest rate Investment Interest Rate Carbon Ridge, Inc. Carbon Ridge, Inc. [Member] Carbon Ridge, Inc. Distribution Type [Axis] Distribution Type [Axis] Schedule of Long-Term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Total expenses Investment Income, Investment Expense Earnings (Loss) Per Share Earnings Per Share, Policy [Policy Text Block] Gallant Pet, Inc. Gallant Pet, Inc. [Member] Gallant Pet, Inc. Amortization of deferred costs related to debt facility Amortization of Debt Issuance Costs Loan Agreement Loan Agreement [Member] Loan Agreement Manifold Inc. Manifold Inc. [Member] Manifold Inc. Document Period End Date Document Period End Date Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] CAPITAL STOCK Equity [Text Block] Crowded Technologies, Inc. Crowded Technologies, Inc. [Member] Crowded Technologies, Inc. MeMed Diagnostics Ltd. MeMed Diagnostics Ltd. [Member] MeMed Diagnostics Ltd. 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Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Company Selected Measure Name Company Selected Measure Name Ratios to average net assets: Investment Company, Financial Ratios [Abstract] Changes in operating assets and liabilities: Increase (Decrease) In Operating Assets And Liabilities [Abstract] Increase (Decrease) In Operating Assets And Liabilities Credit Facility [Domain] Credit Facility [Domain] Asset Class [Domain] Asset Class [Domain] Performing Loans Performing Loans [Member] Performing Loans Related Party Transactions [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Warrants Warrant [Member] Weighted average shares outstanding, diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Variable Rate Component Two Variable Rate Component Two [Member] Variable Rate Component Two Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Dividend and interest receivables Dividend and Interest Receivable Schedule of Changes in Level 3 Assets Measured at Fair Value on Recurring Basis Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Measurement Unput Type [Domain] Measurement Unput Type [Domain] Measurement Unput Type [Domain] Per share amounts: Investment Company, Financial Highlights [Roll Forward] Return of Capital Distributions Cumulative Return Of Capital Distributions [Member] Cumulative Return Of Capital Distributions Award Timing Predetermined Award Timing Predetermined [Flag] Measurement Unput Type [Axis] Measurement Unput Type [Axis] Measurement Unput Type Receipt of equity securities as repayment of loans Investment Company, Paid In Kind Equity Securities Repayment Of Loans During Noncash Transaction Investment Company, Paid In Kind Equity Securities Repayment Of Loans During Noncash Transaction Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Variable Rate Component Three Variable Rate Component Three [Member] Variable Rate Component Three Level 1 Fair Value, Inputs, Level 1 [Member] Investment Company, Net Assets [Roll Forward] Investment Company, Net Assets [Roll Forward] Organization, Consolidation and Presentation of Financial Statements [Abstract] Schedule of Unexpired Unfunded Commitments Other Commitments [Table Text Block] Net investment income (loss) Investment Company, Investment Income (Loss) Ratio All Executive Categories All Executive Categories [Member] Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Repayments of borrowings under debt facility Repayments of Long-Term Lines of Credit Asset coverage ratio Investment Company, Senior Security, Indebtedness, Asset Coverage Ratio CASH AND CASH EQUIVALENTS: Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation [Abstract] Principal payments on loans, net of accretion and Distributions to shareholder Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Most advantageous market effective yield rate Measurement Input, Most Advantageous Market Effective Yield Rate [Member] Measurement Input, Most Advantageous Market Effective Yield Rate Measurement input, probability weighting of alternative outcomes Measurement Input, Probability Weighting Of Alternative Outcomes [Member] Measurement Input, Probability Weighting Of Alternative Outcomes Fair Value Disclosures [Abstract] Debt Disclosure [Abstract] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] SEGMENT INFORMATION Segment Reporting [Text Block] Minimum Minimum [Member] Borrowings under debt facility Long-Term Line of Credit Total distributions to shareholder Investment Company, Dividend Distribution And Return Of Capital Distribution Investment Company, Dividend Distribution And Return Of Capital Distribution Investment Type [Axis] Investment Type [Axis] Expiration Date Trading Arrangement Expiration Date Interest period (in months) Debt Instrument, Basis Spread On Variable Rate, Interest Period Debt Instrument, Basis Spread On Variable Rate, Interest Period Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] LIABILITIES Liabilities [Abstract] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Proceeds from purchase of shares Proceeds from Issuance of Common Stock Shares authorized (in shares) Common Stock, Shares Authorized Number of shares issued in sale (in shares) Sale of Stock, Number of Shares Issued in Transaction Exercise Price Award Exercise Price Document Quarterly Report Document Quarterly Report Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Vesta Housing, Inc. Vesta Housing, Inc. [Member] Vesta Housing, Inc. Weighted-Average Interest Rate – Cash Investment, Interest Rate During Period, Paid In Cash Investment, Interest Rate During Period, Paid In Cash Measurement input Investment Company, Investment Owned, Measurement Input DEBT FACILITY Debt Disclosure [Text Block] Amortized cost Investment Owned, Cost Investment Owned, Cost Management fees Management Fee Expense Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] FINANCIAL HIGHLIGHTS Investment Company, Financial Highlights [Text Block] Equity Component [Domain] Equity Component [Domain] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Measurement Input Type [Domain] Measurement Input Type [Domain] Origination of loans Payment for Purchase, Investment, Operating Activity After Year 9 Management Fee, After Period Nine [Member] Management Fee, After Period Nine Merlyn Mind, Inc. Merlyn Mind, Inc. [Member] Merlyn Mind, Inc. Adoption Date Trading Arrangement Adoption Date Counterparty Name [Domain] Counterparty Name [Domain] NET ASSETS Net assets (equivalent to $398.92 and $263.94 per share based on 100,000 shares of capital stock outstanding - see Note 5 and Note 10) Beginning balance Ending balance Net assets, end of period Equity, Attributable to Parent Number of classes of financial instruments Number Of Classes Of Financial Instruments Number Of Classes Of Financial Instruments ASSETS Assets [Abstract] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Bank fees and other costs Debt Instrument, Fee Amount Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Medical Devices Loan Investments, Medical Devices [Member] Loan Investments, Medical Devices Banking and professional fees Professional Fees Insider Trading Policies and Procedures [Line Items] Interest on loans Interest Income, Operating Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Weighted-Average Interest Rate Investment, Interest Rate During Period Investment, Interest Rate During Period Klar Holdings Limited Klar Holdings Limited [Member] Klar Holdings Limited Investment Company, Distribution Type [Domain] Investment Company, Distribution Type [Domain] Investment Company, Distribution Type [Domain] COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Number of operating segments Number of Operating Segments Entity Central Index Key Entity Central Index Key Weighted Average Weighted Average [Member] Capital paid in on shares of capital stock Additional Paid in Capital, Common Stock All Adjustments to Compensation All Adjustments to Compensation [Member] Investment company, regulated status [true false] Investment Company, Regulated Status [true false] Equity [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Net cash used in operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Income Statement [Abstract] Analysis of Net Assets: Equity, Attributable to Parent [Abstract] Document Transition Report Document Transition Report Return of capital to shareholder (in dollars per share) Investment Company, Tax Return of Capital Distribution, Per Share Ownership [Axis] Ownership [Axis] Net increase (decrease) in accounts payable, other accrued liabilities and accrued management fees Increase (Decrease) in Operating Liabilities Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] EXPENSES: Operating Expenses [Abstract] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Loans with costs basis classified as non-accrual Investment Owned, At Cost, Non-Accrual Investment Owned, At Cost, Non-Accrual City Area Code City Area Code All Individuals All Individuals [Member] SUBSEQUENT EVENTS Subsequent Events [Text Block] Investment, Issuer Name [Domain] Investment, Issuer Name [Domain] Cash distributions to shareholder Payments of Dividends Name Forgone Recovery, Individual Name Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Statement [Line Items] Statement [Line Items] Total assets Assets Entity [Domain] Entity [Domain] Umbra Lab, Inc. Umbra Lab, Inc. [Member] Umbra Lab, Inc. Most advantageous market analysis Valuation, Most Advantageous Market Analysis [Member] Valuation, Most Advantageous Market Analysis Year 9 Management Fee, Period Nine [Member] Management Fee, Period Nine Accounts payable and other accrued liabilities Accounts Payable and Other Accrued Liabilities Net (increase) decrease in other assets Increase (Decrease) in Other Operating Assets PEO PEO [Member] Contributed capital to the fund Investment Company, Accumulated Contributed Capital Investment Company, Accumulated Contributed Capital Management Fee Management fee rate Management and Service Fees, Rate Investment Owned, Balance, Principal Amount Investment Owned, Balance, Principal Amount Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Applicable variable rate margin, contributor two Debt Instrument, Applicable Variable Rate Margin, Contributor Two Debt Instrument, Applicable Variable Rate Margin, Contributor Two Revolving Credit Facility Revolving Credit Facility [Member] Investment Company [Abstract] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Net increase (decrease) in net assets resulting from operations (in dollars per share) Investment Company, Investment Income (Loss) from Operations, Per Share Schedule of Fair Value Measurement Inputs and Valuation Techniques Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Shares outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Financial Support for Nonconsolidated Legal Entity [Table] Financial Support for Nonconsolidated Legal Entity [Table] Variable Rate Component One Variable Rate Component One [Member] Variable Rate Component One Net increase (decrease) in net assets resulting from operations per share, diluted (in dollars per share) Earnings Per Share, Diluted Entity Current Reporting Status Entity Current Reporting Status Net cash provided by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Table] Consolidation, Less-than-Wholly-Owned Subsidiary, Parent Ownership Interest, Effect of Change [Table] Total return Investment Company, Total Return Standard Dental OpCo , Inc. Standard Dental OpCo , Inc. [Member] Standard Dental OpCo , Inc. Ownership percentage Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest Ownership [Domain] Ownership [Domain] Borrowings under debt facility Proceeds from Long-Term Lines of Credit CASH FLOWS FROM FINANCING ACTIVITIES: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Commitment fee Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Software Software Loan Investments, Software [Member] Loan Investments, Software Financial Instruments [Domain] Financial Instruments [Domain] Biolojic Design Ltd. Biolojic Design Ltd. [Member] Biolojic Design Ltd. ASSETS: Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Other income Other Income Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount Management Fee, Period [Axis] Management Fee, Period [Axis] Management Fee, Period Subscription secured borrowings threshold percentage Debt Instrument, Subscription Secured Borrowings Threshold Percentage Debt Instrument, Subscription Secured Borrowings Threshold Percentage Schedule of Financial Highlights Investment Company, Financial Highlights [Table Text Block] Cash Cash Percentage of maximum amount available Line Of Credit Facility, Maximum Amount Available, Percentage Threshold For Commitment Fee Line Of Credit Facility, Maximum Amount Available, Percentage Threshold For Commitment Fee Investment, Issuer Name [Axis] Investment, Issuer Name [Axis] Related Party Transaction [Table] Related Party Transaction [Table] Year 7 Management Fee, Period Seven [Member] Management Fee, Period Seven Commitments & Contingent Liabilities: Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Schedule of Distributions of Capital Stock Dividends Declared [Table Text Block] Current Fiscal Year End Date Current Fiscal Year End Date Applicable variable rate margin, contributor one Debt Instrument, Applicable Variable Rate Margin, Contributor One Debt Instrument, Applicable Variable Rate Margin, Contributor One Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Securities Act File Number Securities Act File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Loans, at estimated fair value Fair value Loans Investment Owned, Fair Value Other Healthcare Loan Investments, Other Healthcare [Member] Loan Investments, Other Healthcare Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Shares issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Beginning balance Ending balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value BASIS OF PRESENTATION Business Description and Basis of Presentation [Text Block] Total Distributable Losses Distributable Income (Loss) [Member] Distributable Income (Loss) Equity Components [Axis] Equity Components [Axis] Other operating expenses Other Cost and Expense, Operating Entity Interactive Data Current Entity Interactive Data Current Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Unamortized fees and costs Debt Issuance Costs, Line of Credit Arrangements, Net Semiconductors & Equipment Loan Investments, Semiconductors And Equipment [Member] Loan Investments, Semiconductors And Equipment Entity Small Business Entity Small Business Truepic Inc. Truepic Inc. [Member] Truepic Inc. Termination Date Trading Arrangement Termination Date Schedule of Weighted Average Interest Rate of Performing and All Loans Schedule Of Investment Weighted Average Interest Rate [Table Text Block] Schedule Of Investment Weighted Average Interest Rate Subsequent Events [Abstract] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Principal payments on loans, net of accretion Proceeds from Disposition of Investment, Operating Activity Document Type Document Type Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value as of Grant Date Award Grant Date Fair Value Net assets per share (in dollars per share) Net asset value, beginning of period (in dollars per share) Net asset value, end of period (in dollars per share) Net Asset Value Per Share Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Investment Company, Distribution Type [Axis] Investment Company, Distribution Type [Axis] Investment Company, Distribution Type Arrangement Duration Trading Arrangement Duration Asset recovery Valuation, Asset Recovery [Member] Valuation, Asset Recovery Statement of Stockholders' Equity [Abstract] Wireless Wireless Loan Investments, Wireless [Member] Loan Investments, Wireless Local Phone Number Local Phone Number Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Distribution Type [Domain] Distribution Type [Domain] Year 1 Management Fee, Period One [Member] Management Fee, Period One Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Unexpired unfunded commitments (see Note 8) Unexpired unfunded commitments to borrowers Commitments and Contingencies Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Weighted-Average Interest Rate – Non-Cash Investment, Interest Rate During Period, Paid In Kind Investment, Interest Rate During Period, Paid In Kind Computers & Storage Loan Investments, Computers And Storage [Member] Loan Investments, Computers And Storage Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Acquisition of equity securities Interest Income, Operating, Paid in Kind Distributions of income to shareholder Investment Company, Dividend Distribution Executive Category: Executive Category [Axis] Year 3 Management Fee, Period Three [Member] Management Fee, Period Three Counterparty Name [Axis] Counterparty Name [Axis] Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] All Award Types Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount FAIR VALUE DISCLOSURES Fair Value Disclosures [Text Block] Level 3 Fair Value, Inputs, Level 3 [Member] Financial Support for Nonconsolidated Legal Entity [Line Items] Financial Support for Nonconsolidated Legal Entity [Line Items] SUPPLEMENTAL DISCLOSURES: Supplemental Cash Flow Information [Abstract] Number of loans within the industry Investment Owned, Number Of Loans Within Industry Investment Owned, Number Of Loans Within Industry Distributions of securities Equity Dividend Distribution [Member] Equity Dividend Distribution PEO Name PEO Name APIsecAI, Inc. APIsecAI, Inc. [Member] APIsecAI, Inc. Internet Internet Loan Investments, Internet [Member] Loan Investments, Internet Other assets Other Assets Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Legal Entity [Axis] Legal Entity [Axis] Interest expense Interest Expense, Debt NON-CASH OPERATING AND FINANCING ACTIVITIES: Noncash Operating And Financing Items [Abstract] Noncash Operating And Financing Items Beginning of period End of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Accrued management fees Management Fee Payable Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] ORGANIZATION AND OPERATIONS OF THE FUND Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Debt Instrument [Axis] Debt Instrument [Axis] Most advantageous market analysis and asset recovery Most Advantageous Market Analysis And Asset Recovery [Member] Most Advantageous Market Analysis And Asset Recovery Cash distributions Cash Dividend Distribution [Member] Cash Dividend Distribution Long-Term Debt, Type [Domain] Long-Term Debt, Type [Domain] Net increase (decrease) in net assets resulting from operations per share, basic (in dollars per share) Earnings Per Share, Basic Measurement Input Type [Axis] Measurement Input Type [Axis] Belong, Inc. Belong, Inc. [Member] Belong, Inc. Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Award Type Award Type [Axis] Payments of bank facility fees and costs Payments of Financing Costs Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash used in operating activities: Adjustments To Reconcile Net Assets From Operations To Cash Provided By (Used In) Operating Activities [Abstract] Adjustments To Reconcile Net Assets From Operations To Cash Provided By (Used In) Operating Activities Total distributable losses Retained Earnings (Accumulated Deficit) Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock Common Stock [Member] Unexpired unfunded commitment Investment Company, Financial Support to Investee Contractually Required, Not Provided, Amount Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Return of capital to shareholder Investment Company, Tax Return of Capital Distribution Equity Awards Adjustments Equity Awards Adjustments [Member] Employee Stock Option Share-Based Payment Arrangement, Option [Member] Acquisitions and originations Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Loans Loans [Member] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Asset Class [Axis] Asset Class [Axis] Percent of net assets Investment Owned, Net Assets, Percentage Tabular List, Table Tabular List [Table Text Block] Technology Services Technology Services Loan Investments, Technology Services [Member] Loan Investments, Technology Services CASH PAID DURING THE PERIOD: Cash, Cash Equivalents, Restricted Cash, And Restricted Cash Equivalents, Paid During Period [Abstract] Cash, Cash Equivalents, Restricted Cash, And Restricted Cash Equivalents, Paid During Period Other Technology Other Technology Loan Investments, Other Technology [Member] Loan Investments, Other Technology Name Awards Close in Time to MNPI Disclosures, Individual Name Investment, Identifier [Axis] Investment, Identifier [Axis] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Distributions of income to shareholder (in dollars per share) Investment Company, Distribution to Shareholders, Per Share Contributions from shareholder Adjustments To Additional Paid In Capital, Shareholder Contributions, Cash Adjustments To Additional Paid In Capital, Shareholder Contributions, Cash Adjustment to Compensation: Adjustment to Compensation [Axis] WTI Fund XI, Inc. WTI Fund XI, Inc. [Member] WTI Fund XI, Inc. Variable Rate Component [Domain] Variable Rate Component [Domain] Variable Rate Component [Domain] Distributions of equity securities to shareholder Warrant Issued Warrant Issued Teiko Bio, Inc. Teiko Bio, Inc. [Member] Teiko Bio, Inc. Dividends Payable [Line Items] Dividends Payable [Line Items] Dividends Payable [Table] Dividends Payable [Table] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Interest - Debt facility Interest Paid, Excluding Capitalized Interest, Operating Activity Statement of Cash Flows [Abstract] Credit Facility [Axis] Credit Facility [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Total Assets, Fair Value Disclosure Ava Finance, Inc. Ava Finance, Inc. [Member] Ava Finance, Inc. Name Measure Name Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Debt Instrument [Line Items] Debt Instrument [Line Items] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Management Fee, Period [Domain] Management Fee, Period [Domain] Management Fee, Period [Domain] Additional Paid-in Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Contributions from shareholder Investment Company, Committed Capital Name Trading Arrangement, Individual Name Contributions from shareholder (in dollars per share) Investment Company, Contributions From Shareholder, Per Share Investment Company, Contributions From Shareholder, Per Share Total assets representing non-qualifying assets, percentage Investment Owned, Percent Of Net Assets Representing Non-Qualifying Assets Investment Owned, Percent Of Net Assets Representing Non-Qualifying Assets Additional borrowing capacity Line of Credit Facility, Additional Borrowing Capacity Line of Credit Facility, Additional Borrowing Capacity Company Selected Measure Amount Company Selected Measure Amount Year 8 Management Fee, Period Eight [Member] Management Fee, Period Eight Year 2 Management Fee, Period Two [Member] Management Fee, Period Two Entity Address, Address Line Two Entity Address, Address Line Two Total investment income Gross Investment Income, Operating Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] Award Timing Method Award Timing Method [Text Block] Net increase (decrease) in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Portfolio turn-over rate Investment Company, Portfolio Turnover Net increase (decrease) in net assets resulting from operations Net (decrease) increase in net assets resulting from operations Net increase (decrease) in net assets resulting from operations Net Income (Loss) Attributable to Parent Long-Term Debt, Type [Axis] Long-Term Debt, Type [Axis] Biotechnology Loan Investments, Biotechnology [Member] Loan Investments, Biotechnology Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Statement [Table] Statement [Table] Restatement Determination Date: Restatement Determination Date [Axis] Year 4 Management Fee, Period Four [Member] Management Fee, Period Four End of term payment Investment Owned, End Of Term Payment Investment Owned, End Of Term Payment INVESTMENT INCOME: Revenues [Abstract] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]