Distributions, per share (in usd per share) Common Stock, Dividends, Per Share, Cash Paid TRS Services, LLC TRS Services, LLC [Member] TRS Services, LLC Statistical Measurement [Domain] Statistical Measurement [Domain] Investment classification Investment, Policy [Policy Text Block] Non-control/non-affiliate investments Investment, Unaffiliated Issuer [Member] Capital Loss Carryforward [Axis] Capital Loss Carryforward [Axis] Capital Loss Carryforward Constant default rate Measurement Input, Default Rate [Member] Award Timing Predetermined Award Timing Predetermined [Flag] Related Party Transaction [Axis] Related Party Transaction [Axis] Receivable for investments sold Increase (Decrease) in Receivable for Investment Sold Payment-in-kind interest and dividend income: Interest and Dividend Income, Operating, Paid in Kind O 2023 Q2 Aggregate Dividends O 2023 Q2 Aggregate Dividends [Member] O 2023 Q2 Aggregate Dividends Asset Class [Axis] Asset Class [Axis] Dividend income: Dividend Income, Operating, Paid in Cash Securities Act File Number Paid-in capital in excess of par Additional Paid-in Capital [Member] Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Tabular List, Table Tabular List [Table Text Block] Investments Schedule of Investments [Text Block] Amendment fees received Fee Income [Member] Fee Income Schedule of Distributions Declared Dividends Declared [Table Text Block] New Accounting Pronouncements and Rule Issuances New Accounting Pronouncements, Policy [Policy Text Block] Schedule of Related Party Expenses and Distributions Schedule of Related Party Transactions [Table Text Block] Income tax (expense) benefit on net realized gains on investments Realized Gain (Loss), Investment and Derivative, Operating, Tax Expense (Benefit) Investment concentration risk Investment Concentration Risk [Member] Investment Concentration Risk Second lien debt investments Second Lien Debt Investments [Member] Second Lien Debt Investments Debt investments Debt Securities [Member] Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Total return based on market value Investment Company, Total Return, Market Value Measurement Basis [Axis] Measurement Basis [Axis] Net increase (decrease) in net assets resulting from operations per common share - basic (in usd per share) Earnings Per Share, Basic Adjustment to Compensation: Adjustment to Compensation [Axis] Related Party Transactions Related Party Transactions Disclosure [Text Block] Net operating loss carryforward (OFSCC-MB; C-Corporation) Investment Company, Distributable Earnings (Loss), Accumulated Operating Loss Carryforward Investment Company, Distributable Earnings (Loss), Accumulated Operating Loss Carryforward Schedule of Credit Facilities Schedule of Line of Credit Facilities [Table Text Block] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Stock, Class of Stock [Table] Stock, Class of Stock [Table] Total deferred tax assets Deferred Tax Assets, Gross Discount rates Measurement Input, Discount Rate [Member] Number of Shares Purchased (in shares) Stock Repurchased During Period, Shares, Dividend Reinvestment Plan Stock Repurchased During Period, Shares, Dividend Reinvestment Plan Ordinary income (RIC) Investment Company, Distributable Earnings (Loss), Accumulated Ordinary Income (Loss) Schedule of Cash and Cash Equivalents Schedule of Cash and Cash Equivalents [Table Text Block] EBITDA multiples Measurement Input, EBITDA Multiple [Member] Measurement Input Type [Domain] Measurement Input Type [Domain] Adjustment to Compensation, Amount Adjustment to Compensation Amount Concentration risk, percentage Percentage of Total Concentration Risk, Percentage Affiliated entity Affiliated Entity [Member] Net unrealized appreciation (depreciation) on investments held Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) Debt covenant, asset coverage Debt Instrument, Covenant, Asset Coverage Percentage Debt Instrument, Covenant, Asset Coverage Percentage Principles of consolidation Consolidation, Policy [Policy Text Block] Total Investments and Cash Equivalents, Amortized Cost Investment Owned, Amortized Cost And Cash Equivalents, At Carrying Value Investment Owned, Amortized Cost And Cash Equivalents, At Carrying Value Distributions received from portfolio investments Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Distributions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Distributions Employee Stock Option Share-Based Payment Arrangement, Option [Member] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Cash and cash equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Net realized (loss) gain Net realized loss on investments, net of taxes Net Realized Gain (Loss) Debt and Equity Securities, Realized Gain (Loss) Average net asset value Investment Company, Average Net Assets Percentage of total consolidated assets Total Assets To Consolidated Total Assets, Percentage Total Assets To Consolidated Total Assets, Percentage Total net assets Balance Balance Net asset value at end of year Equity, Attributable to Parent O 2024 Q3 Aggregate Dividends O 2024 Q3 Aggregate Dividends [Member] O 2024 Q3 Aggregate Dividends Distributions from net investment income Ordinary taxable income Investment Company, Distribution, Ordinary Income Insider Trading Policies and Procedures [Line Items] Common stock, authorized (in shares) Common Stock, Shares Authorized Total from operations (in usd per share) Investment Company, Investment Income (Loss) from Operations, Per Share Unsecured Notes Due July 2028, Overallotments Unsecured Notes Due July 2028, Overallotments [Member] Unsecured Notes Due July 2028, Overallotments Redstone Holdco 2 LP (F/K/A RSA Security) Redstone Holdco 2 LP (F/K/A RSA Security) [Member] Redstone Holdco 2 LP (F/K/A RSA Security) Capitalized PIK interest and dividends Interest Income, Operating, Capitalized Paid In Kind Interest And Dividends [Member] Interest Income, Operating, Capitalized Paid In Kind Interest And Dividends Total liabilities and net assets Liabilities and Equity Wellful Inc. (F/K/A KNS Acquisition Corp.) Wellful Inc. [Member] Wellful Inc. Effective interest rate Line of Credit Facility, Interest Rate at Period End Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Unsecured Notes due February 2026 Unsecured Notes Due February 2026 Unsecured Notes Due February 2026 [Member] Unsecured Notes Due February 2026 Concentration of credit risk Concentration Risk, Credit Risk, Policy [Policy Text Block] 12 Interactive, LLC (D/B/A PerkSpot) 12 Interactive, LLC [Member] 12 Interactive, LLC Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Maximum Maximum [Member] Investments in and Advances to Affiliates [Line Items] Investments in and Advances to Affiliates [Line Items] Accounting Policies [Abstract] Unsecured Note Due August 2029 Unsecured Notes Due August 2029 [Member] Unsecured Notes Due August 2029 Unsecured Notes due October 2028 Unsecured Notes Due October 2028 Unsecured Notes Due October 2028 [Member] Unsecured Notes Due October 2028 BNP Facility BNP Facility [Member] BNP Facility Income Tax Contingency [Line Items] Income Tax Contingency [Line Items] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Reduction in base management fee Investment Company, Contractual Fee Waived 4.75 Percent Notes Due 2026 [Member] 4.75 Percent Notes Due 2026 Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Debt Instrument [Line Items] Debt Instrument [Line Items] Investment, Identifier [Axis] Investment, Identifier [Axis] Dividends Payable [Line Items] Dividends Payable [Line Items] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Pay vs Performance Disclosure [Line Items] Investments, at fair value Fair Value Fair value of investments Fair Value Fair Value Investment Owned, Fair Value Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Control investments Investment, Affiliated Issuer, Controlled [Member] Liabilities Liabilities [Abstract] Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Payable for investments purchased Payable, Investment, Purchase Entity Shell Company Average outstanding balance Average Dollar Borrowings Long-Term Debt, Average Amount Outstanding Schedule of Carrying Values and Fair Values of Debt Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block] Schedule of Long-Term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] 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] Statement of Stockholders' Equity [Abstract] Schedule of Income Taxes Paid Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Interest and dividend receivable Increase (Decrease) in Interest and Dividends Receivable Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount Cash and cash equivalents Cash Cash Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Line of Credit Facility [Table] Line of Credit Facility [Table] Envocore Holding, LLC (F/K/A LRI Holding, LLC) Envocore Holding, LLC (F/K/A LRI Holding, LLC) [Member] Envocore Holding, LLC (F/K/A LRI Holding, LLC) Measurement Input Type [Axis] Measurement Input Type [Axis] Investment, Issuer Affiliation [Axis] Investment, Issuer Affiliation [Axis] Name Measure Name OFSCC-FS OFSCC-FS [Member] OFSCC-FS Base management fees Management Fee Expense Class of Stock [Line Items] Class of Stock [Line Items] Industry Sector [Domain] Industry Sector [Domain] Document Fiscal Period Focus Tax reclassifications of permanent differences Permanent differences, reclassifications to (increase) decrease additional paid-in capital against total distributable earnings (accumulated loss) Investment Company, Tax Reclassification, Increase (Decrease) Unsecured Notes Unsecured Debt [Member] O 2025 Q3 Aggregate Dividends O 2025 Q3 Aggregate Dividends [Member] O 2025 Q3 Aggregate Dividends Award Timing Method Award Timing Method [Text Block] Revenue multiples Measurement Input, Revenue Multiple [Member] Award Type Award Type [Axis] Qualifying assets percentage Investment Company, Qualifying Assets Percentage Investment Company, Qualifying Assets Percentage Income Tax Contingency [Table] Income Tax Contingency [Table] Transaction price Measurement Input, Quoted Price [Member] Legal Entity [Axis] Incentive fee, realized capital gains Investment Advisory Agreement - Incentive Fee Rate, Realized Capital Gains [Member] Investment Advisory Agreement - Incentive Fee Rate, Realized Capital Gains Integrated Energy Services, LLC Integrated Energy Services, LLC [Member] Integrated Energy Services, LLC Total assets Assets Assets Investment, Name [Domain] Investment, Name [Domain] Trading Symbol Total Investments and Cash Equivalents, Principal Amount Investment Owned, Cash And Cash Equivalents At Principal Amount Investment Owned, Cash And Cash Equivalents At Principal Amount JP Intermediate B, LLC JP Intermediate B, LLC [Member] JP Intermediate B, LLC Geographical [Domain] Geographical [Domain] Income taxes Income Tax, Policy [Policy Text Block] Reclassification of deferred offering costs from the issuance of Unsecured Notes Debt Issuance Costs Incurred During Noncash or Partial Noncash Transaction Entity Address, City or Town Cash flows from operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Receivable for investments sold Receivable, Investment, Sale Total deferred tax assets Deferred Tax Assets, Net of Valuation Allowance Concentration Risk Type [Axis] Concentration Risk Type [Axis] Cash Equivalents, Principal Amount Cash Equivalents, Principal Balance, Amount Cash Equivalents, Principal Balance, Amount Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Statement of Income Location, Balance [Domain] Statement of Income Location, Balance [Domain] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Schedule of Tax Character of Distributions Paid Investment Company, Distribution To Shareholders [Table Text Block] Investment Company, Distribution To Shareholders Amortization of Net Loan Fees Amortization of Deferred Loan Origination Fees, Net Portfolio Fair Value Investment Portfolio Fair Value [Member] Investment Portfolio Fair Value Recovery rate Measurement Input, Recovery Rate [Member] Measurement Input, Recovery Rate Significant Subsidiaries Significant Subsidiaries Policy [Policy Text Block] Significant Subsidiaries Policy Entity Emerging Growth Company 2028 Long-Term Debt, Maturity, Year Three Distributions declared per common share (in usd per share) Common Stock, Dividends, Per Share, Declared Entity Common Stock, Shares Outstanding Principal Amount Investment Owned, Balance, Principal Amount Changes in operating assets and liabilities: Increase (Decrease) in Operating Assets [Abstract] 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] Level 2 Fair Value, Inputs, Level 2 [Member] Unamortized Debt Issuance Costs Unamortized Debt Issuance Costs Debt Issuance Costs, Net Document Financial Statement Error Correction [Flag] Incentive fee Investment Advisory Agreement, Incentive Fee [Member] Investment Advisory Agreement, Incentive Fee Investments, Owned, Federal Income Tax Note [Line Items] Investments, Owned, Federal Income Tax Note [Line Items] Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Distributions paid to affiliates Payments of Distributions to Affiliates Number of common shares outstanding (in shares) Common stock, outstanding (in shares) Balance (in shares) Balance (in shares) Shares outstanding at end of period (in shares) Common Stock, Shares, Outstanding Net asset value liquidation Measurement Input, Net Asset Value Liquidation [Member] Measurement Input, Net Asset Value Liquidation Finance and Insurance Finance and Insurance [Member] Finance and Insurance Long-term capital gain Investment Company, Distribution, Long-Term Capital Gain Document Information [Table] PEO PEO [Member] Transfers from Level 2 to Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 Manufacturing Manufacturing [Member] Manufacturing Affiliate investments Investment, Affiliated Issuer [Member] Unsecured Notes [Member] Unsecured Notes Wholesale Trade Wholesale Trade [Member] Wholesale Trade United States of America UNITED STATES 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] Public Administration Public Administration [Member] Public Administration Total distributable earnings (accumulated losses) Retained Earnings [Member] 4.95% Notes due 2028 4.95 Percent Notes Due 2028 [Member] 4.95 Percent Notes Due 2028 Capital loss carryforwards: Investment Company, Distributable Earnings (Loss), Accumulated Capital Loss Carryforward [Abstract] Investment Company, Distributable Earnings (Loss), Accumulated Capital Loss Carryforward Effective Interest Rate Effective Interest Rate Debt Instrument, Interest Rate, Effective Percentage Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Cash and cash equivalents — beginning of year Cash and cash equivalents — end of year Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Basis spread on variable interest rate Debt Instrument, Basis Spread on Variable Rate Net increase (decrease) Stockholders' Equity, Period Increase (Decrease) Level 3 assets, beginning balance Level 3 assets, ending balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value O 2024 Q4 Aggregate Dividends O 2024 Q4 Aggregate Dividends [Member] O 2024 Q4 Aggregate Dividends Interest payable Increase (Decrease) in Interest Payable, Net Document Information [Line Items] Purchase and origination of portfolio investments Payment for Purchase, Investment, Operating Activity Preferred stock, issued (in shares) Preferred Stock, Shares Issued Unsecured Notes (net of discounts and deferred debt issuance costs of $2,812 and $1,688, respectively) Unsecured Debt Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Incentive fee, quarterly catch-up threshold Investment Advisory Agreement - Incentive Fee Rate, Quarterly Catch-Up Threshold [Member] Investment Advisory Agreement - Incentive Fee Rate, Quarterly Catch-Up Threshold Total return based on net asset value Investment Company, Total Return Stated interest expense Interest Expense, Debt, Excluding Amortization Tax-basis gross unrealized depreciation on investments Investment, Tax Basis, Unrealized Loss Net investment income Net investment income Net Investment Income Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Stock repurchase program, period Share Repurchase Program, Period in Force Organization, Consolidation and Presentation of Financial Statements [Abstract] Debentures Notes Payable, Other Payables [Member] Cash Distribution Investment Company, Dividend Distribution Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] City Area Code Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] U.S. federal income taxes Income Tax Paid, Federal, after Refund Received All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Interest rate, cash Investment, Interest Rate, Paid in Cash Undistributed earnings and profits (OFSCC-MB; C-Corporation) Investment Company, Distributable Earnings (Loss), Accumulated Long-Term Capital Gain (Loss) Commitments and Contingencies Disclosure [Abstract] Borrowings under revolving lines of credit Proceeds from Long-Term Lines of Credit Total distributions to common stockholders Investment Company, Dividend Distribution And Tax Return Of Capital Distribution Investment Company, Dividend Distribution And Tax Return Of Capital Distribution Total expenses Investment Company, Expense, after Reduction of Fee Waiver and Reimbursement Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Term Debt Instrument, Term Related Party Transactions [Abstract] Income Incentive Fee Income Incentive Fee Incentive Fee Expense Investments in and Advances to Affiliates, at Fair Value [Roll Forward] Investments in and Advances to Affiliates, at Fair Value [Roll Forward] Amendment fees received Amendment Fees Collected Amendment Fees Collected Sale and redemption of portfolio investments Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales Preferred stock, par value (in usd per share) Preferred Stock, Par or Stated Value Per Share Subsequent Event Subsequent Event [Member] Discount margin Measurement Input, Discount Margin [Member] Measurement Input, Discount Margin Payable to investment adviser and affiliates and Other liabilities Other Liabilities Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Long-Term Debt, Type [Axis] Long-Term Debt, Type [Axis] Incentive fee, pre-incentive fee net investment income below catch-up threshold Investment Advisory Agreement - Incentive Fee Rate, Pre-Incentive Fee Net Investment Income Below Catch-Up Threshold [Member] Investment Advisory Agreement - Incentive Fee Rate, Pre-Incentive Fee Net Investment Income Below Catch-Up Threshold Honor HN Buyer Inc. Honor HN Buyer Inc [Member] Honor HN Buyer Inc Interest Rate, PIK Investment, Interest Rate, Paid in Kind O 2023 Q3 Aggregate Dividends O 2023 Q3 Aggregate Dividends [Member] O 2023 Q3 Aggregate Dividends Schedule of Investments [Abstract] Equity Components [Axis] Equity Components [Axis] Net investment income per common share - diluted (in usd per share) Investment Company, Investment Income (Loss), Per Share, Diluted Transfers from Level 3 to Level 2 Transfers from Level 3 to Level 2 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 Auditor Name Pfanstiehl Holdings, Inc. Pfanstiehl Holdings, Inc [Member] Pfanstiehl Holdings, Inc Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Accretion of interest income on Structured Finance Securities Interest Income, Operating, Accretion Of Interest Income [Member] Interest Income, Operating, Accretion Of Interest Income Number of reportable segments Number of Reportable Segments Schedule of Financial Highlights Investment Company, Financial Highlights [Table Text Block] Health Care and Social Assistance Health Care and Social Assistance [Member] Health Care and Social Assistance Supplemental Disclosure of Cash Flow Information: Supplemental Cash Flow Information [Abstract] BayMark Health Services, Inc. BayMark Health Services, Inc. [Member] BayMark Health Services, Inc. Other Performance Measure, Amount Other Performance Measure, Amount Payments of deferred debt issuance costs Payments of Debt Issuance Costs Entity Address, State or Province Tax-basis amortized cost of investments Investment, Tax Basis, Cost Distributions Dividends Related Party [Domain] Related and Nonrelated Parties [Domain] Affiliate investments Investment, Affiliated Issuer, Noncontrolled [Member] Underwriting fees Debt Issuance Costs, Underwriting Fees, Gross Debt Issuance Costs, Underwriting Fees, Gross Investment Company, Net Assets [Roll Forward] Investment Company, Net Assets [Roll Forward] Individual: Individual [Axis] Fair value of financial instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Short-Term Capital Loss Carryforward Short-Term Capital Loss Carryforward [Member] Short-Term Capital Loss Carryforward Distributions paid to common stockholders Payments of Ordinary Dividends, Common Stock Document Annual Report Conversion from debt investments to equity investments Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers Other Services (except Public Administration) Other Services (Except Public Administration) [Member] Other Services (Except Public Administration) O 2025 Q2 Aggregate Dividends O 2025 Q2 Aggregate Dividends [Member] O 2025 Q2 Aggregate Dividends Entity [Domain] Taxable Blocker Subsidiaries Taxable Blocker Subsidiaries [Member] Taxable Blocker Subsidiaries 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] Cash paid for interest Cash paid for interest expense Interest Paid, Excluding Capitalized Interest, Operating Activity Document Fiscal Year Focus Basis of presentation Basis of Accounting, Policy [Policy Text Block] Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Redemption of debt Repayments of Long-Term Debt Distributions Investment Company, Distribution [Policy Text Block] Entity Interactive Data Current RIC Entities RIC Entities [Member] RIC Entities Ratio of total expenses to average net assets Investment Company, Expense Ratio after Incentive Allocation Carrying Value Reported Value Measurement [Member] Number of components of incentive fee Related Party Transaction, Number Of Components Related Party Transaction, Number Of Components Capital loss carryforwards Investment Company, Distributable Earnings (Loss), Accumulated Capital Loss Carryforward Valuation allowance on deferred tax assets Deferred Tax Assets, Valuation Allowance Equity [Abstract] Investments, amortized cost Amortized Cost Investment Owned, Cost Information Information [Member] Information OFS Capital Corporation OFS Capital Corporation [Member] OFS Capital Corporation Medrina LLC Medrina LLC [Member] Medrina LLC 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] Brightwood Capital MM CLO 2023-1, Ltd. Brightwood Capital MM CLO 2023-1, Ltd. [Member] Brightwood Capital MM CLO 2023-1, Ltd. Other Commitments [Line Items] Other Commitments [Line Items] Investment Advisory Agreement Investment Advisory Agreement [Member] Investment Advisory Agreement SBA Debentures SBA Debentures [Member] SBA Debentures Schedule of Commitments to Fund Investments Schedule For Financial Support For Nonconsolidated Entity [Table Text Block] Schedule For Financial Support For Nonconsolidated Entity Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Weighted Average Weighted Average [Member] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Fair value of loans on non-accrual status Investment Owned, At Fair Value, Nonaccrual Investment Owned, At Fair Value, Nonaccrual Amortization of intangible asset Amortization of Intangible Assets Ratio of loss on extinguishment of debt to average net assets Investment Company, Gain (Loss) On Extinguishment Of Debt Ratio Investment Company, Gain (Loss) On Extinguishment Of Debt Ratio Construction Construction Sector [Member] Total debt and equity investments Debt And Equity Investments [Member] Debt And Equity Investments Net unrealized (appreciation) depreciation on investments, net of deferred taxes Net unrealized (appreciation) depreciation on investments, net of deferred taxes Unrealized Gain (Loss), Investment and Derivative, Operating, after Tax Net asset value per share (in usd per share) Net asset value per share at beginning of year (in usd per share) Net asset value per share at end of year (in usd per share) Customer [Domain] Customer [Domain] Entity Central Index Key PEO Name PEO Name Schedule of Scheduled Maturities Schedule of Maturities of Long-Term Debt [Table Text Block] Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] O 2024 Q1 Aggregate Dividends O 2024 Q1 Aggregate Dividends [Member] O 2024 Q1 Aggregate Dividends Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Revolving Credit Facility Revolving Credit Facility [Member] Write-off of deferred offering costs Deferred Debt Issuance Cost, Writeoff Arrangement Duration Trading Arrangement Duration Investment, Issuer Name [Domain] Investment, Issuer Name [Domain] Exercise Price Award Exercise Price Entity Filer Category Dividends Dividend Income, Operating Local Phone Number Class of Stock [Domain] Class of Stock [Domain] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] RumbleOn, Inc. RumbleOn, Inc. [Member] RumbleOn, Inc. Subsequent Event Type [Axis] Subsequent Event Type [Axis] Total Investments and Cash Equivalents, Fair Value Investment Owned, Fair Value And Cash Equivalents At Fair Value Investment Owned, Fair Value And Cash Equivalents At Fair Value Schedule of Tax-Basis Components of Distributable Earnings Investment Company, Components Of Distributable Earnings (Accumulated Losses) [Table Text Block] Investment Company, Components Of Distributable Earnings (Accumulated Losses) Real Estate and Rental and Leasing Real Estate And Rental And Leasing [Member] Real Estate And Rental And Leasing Payable for investments purchased Increase (Decrease) in Payable for Investment Purchased Assets Assets [Abstract] Proceeds from Unsecured Notes issuances, net of commissions and discounts Net proceeds Proceeds from Issuance of Unsecured Debt Credit Facility [Axis] Credit Facility [Axis] Gross Additions Investments in and Advances to Affiliates, at Fair Value, Gross Additions Nonrelated party Nonrelated Party [Member] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Debt Instrument [Axis] Distributions from tax return of capital Return of capital Investment Company, Tax Return of Capital Distribution Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Loss on extinguishment of debt Loss on extinguishment of debt Gain (Loss) on Extinguishment of Debt Credit Facility [Domain] Credit Facility [Domain] Net unrealized appreciation (depreciation) on investments Net Change in Unrealized Appreciation/ (Depreciation) Debt and Equity Securities, Unrealized Gain (Loss) Net Assets Equity, Attributable to Parent [Abstract] Consolidated schedule of investments in and advances to affiliates Schedule of Investments in and Advances to Affiliates, Schedule of Investments [Table Text Block] 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] Principal Amount Percentage of Total, Net Assets Investment Owned, Net Assets, Percentage Entity Address, Address Line One Entity Address, Address Line Two DRIP Shares Value(1) Dividend Reinvestment Plan, Participation Amount Dividend Reinvestment Plan, Participation Amount Contract Datascan Holdings, Inc. Contract Datascan Holdings, Inc. [Member] Contract Datascan Holdings, Inc. Amortized cost of loans on non-accrual status Investment Owned, At Cost, Nonaccrual Investment Owned, At Cost, Nonaccrual Interest rate Stated Interest Rate Debt Instrument, Interest Rate, Stated Percentage Investment, Name [Axis] Investment, Name [Axis] Loss on extinguishment of debt Gain (Loss) on Extinguishment of Debt, before Debt Issuance Cost Writeoff Deferred debt issuance costs and Deferred offering costs Deferred Charges, Policy [Policy Text Block] Tax-basis gross unrealized appreciation on investments Investment, Tax Basis, Unrealized Gain Investments [Domain] Investments [Domain] Entity Voluntary Filers Mezzanine debt Structured Finance Securities, Mezzanine Debt [Member] Structured Finance Securities, Mezzanine Debt Base management fee percentage Management and Service Fees, Base Rate Financial Support for Nonconsolidated Legal Entity [Table] Financial Support for Nonconsolidated Legal Entity [Table] Industry Sector [Axis] Industry Sector [Axis] First Brands Group, LLC First Brands Group, LLC [Member] First Brands Group, LLC Investment Company [Abstract] Financial Highlights Investment Company, Financial Highlights [Text Block] Fair Value as of Grant Date Award Grant Date Fair Value Associated Spring, LLC Associated Spring, LLC [Member] Associated Spring, LLC Entity Registrant Name Management of Companies and Enterprises Management Of Companies And Enterprises [Member] Management Of Companies And Enterprises Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Avison Young Inc. Avison Young Inc. [Member] Avison Young Inc. Schedule of Debt Instruments Schedule of Long-Term Debt Instruments [Table Text Block] O 2025 Q1 Aggregate Dividends O 2025 Q1 Aggregate Dividends [Member] O 2025 Q1 Aggregate Dividends Related Party Transaction [Line Items] Related Party Transaction [Line Items] U.S. federal excise taxes (refunds) Excise And Sales Tax Expense (Reversal) Excise And Sales Tax Expense (Reversal) Gross Reductions Investments in and Advances to Affiliates, at Fair Value, Gross Reductions Effective accretable yield Investment, Interest Rate, Effective Accretable Yield Investment, Interest Rate, Effective Accretable Yield Schedule of Significant Level 3 Inputs Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Counterparty Name [Domain] Counterparty Name [Domain] Cash Equivalents, Fair Value Cash Equivalents, Fair Value Disclosure Cash Equivalents, Fair Value Disclosure Number of operating segments Number of Operating Segments Accretion of interest income on Structured Finance Securities Accretion (Amortization) of Discounts and Premiums, Investments Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Investment Type [Axis] Investment Type [Axis] Related Party [Axis] Related and Nonrelated Parties [Axis] Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount 6.375 Percent Notes Due 2025 [Member] 6.375 Percent Notes Due 2025 Unsecured Notes Due July 2028 Unsecured Notes Due July 2028 [Member] Unsecured Notes Due July 2028 Repayments under revolving lines of credit Repayments of Long-Term Lines of Credit Prepaid expenses and other assets Prepaid Expense and Other Assets Restatement Determination Date: Restatement Determination Date [Axis] Portfolio Net Assets Investment Portfolio Net Assets [Member] Investment Portfolio Net Assets Non-PEO NEO Non-PEO NEO [Member] 5.95 Percent Notes Due 2026 [Member] 5.95 Percent Notes Due 2026 Location of amounts included in earnings - 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RideNow Group, Inc. [Member] RideNow Group, Inc. Per share operating performance: Investment Company, Per Share Operating Performance [Roll Forward] Investment Company, Per Share Operating Performance Availability Line of Credit Facility, Remaining Borrowing Capacity Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Distributions declared per common share (in usd per share) Investment Company, Distribution to Shareholders, Net Investment Income, Per Share Investment Company, Distribution to Shareholders, Net Investment Income, Per Share Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Incentive fee, pre-incentive fee net investment income exceeds catch-up threshold Investment Advisory Agreement - Incentive Fee Rate, Pre-Incentive Fee Net Investment Income Exceeds Catch-Up Threshold [Member] Investment Advisory Agreement - Incentive Fee Rate, Pre-Incentive Fee Net Investment Income Exceeds Catch-Up Threshold First lien debt investments, unitranche First Lien Debt 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Investments [Table] Total debt Debt Instrument, Fair Value Disclosure Document Type Level 3 Fair Value, Inputs, Level 3 [Member] Name Outstanding Recovery, Individual Name Paid-in capital in excess of par Additional Paid in Capital Schedule of Tax-Basis Cost of Investments and Associated Tax-Basis Gross Unrealized Appreciation (Depreciation) Federal Income Tax Note [Table Text Block] All Individuals All Individuals [Member] One GI LLC One GI LLC [Member] One GI LLC Long-Term Debt, Type [Domain] Long-Term Debt, Type [Domain] Fair Value Disclosures [Abstract] Name Forgone Recovery, Individual Name Tax-basis net unrealized appreciation on investments Investment, Tax Basis, Unrealized Gain (Loss) Distributions declared per common share (in usd per share) Amount Per Share (in usd per share) Investment Company, Distribution to Shareholders, Per Share Statistical Measurement [Axis] Statistical Measurement [Axis] Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That 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Compensation Amount Aggregate Erroneous Compensation Amount Amortization of Net Loan Fees Interest Income, Operating, Amortization Of Net Loan Fees [Member] Interest Income, Operating, Amortization Of Net Loan Fees Capital Loss Carryforward [Domain] Capital Loss Carryforward [Domain] Capital Loss Carryforward [Domain] Natixis Facility Natixis Facility [Member] Natixis Facility Incentive fee, pre-incentive fee net income Investment Advisory Agreement, Incentive Fee Rate, Pre-Incentive Fee Net Income [Member] Investment Advisory Agreement, Incentive Fee Rate, Pre-Incentive Fee Net Income Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Boca Home Care Holdings, Inc. Boca Home Care Holdings, Inc. [Member] Boca Home Care Holdings, Inc. Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] GoTo Group (F/K/A LogMeIn, Inc.) GoTo Group (F/K/A LogMeIn, Inc.) [Member] GoTo Group (F/K/A LogMeIn, Inc.) Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Geographical [Axis] Geographical [Axis] Other assets and liabilities Increase (Decrease) in Other Operating Assets and Liabilities, Net Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Level 1 Fair Value, Inputs, Level 1 [Member] Revolving lines of credit Outstanding debt Long-Term Line of Credit Related Party Transaction [Table] Related Party Transaction [Table] Net increase (decrease) in net assets resulting from operations per common share - diluted (in usd per share) Earnings Per Share, Diluted Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Title of 12(b) Security Supplemental Disclosure of Non-Cash Activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Master Cutlery, LLC Master Cutlery, LLC [Member] Master Cutlery, LLC Issuance/repurchase of common stock (in usd per share) Investment Company,, Issuance Of Common Stock, Net Of Repurchases Investment Company,, Issuance Of Common Stock, Net Of Repurchases Cayman Islands CAYMAN ISLANDS Dividends [Axis] Dividends [Axis] DRIP Shares Value Stock Issued During Period, Value, Dividend Reinvestment Plan Net investment income Investment Income, Operating, after Expense and Tax U.S. state and local income taxes Income Tax Paid, State and Local, after Refund Received Clevertech Bidco, LLC Clevertech Bidco, LLC [Member] Clevertech Bidco, LLC Proceeds from sale or redemption of portfolio investments Proceeds From Disposition Of Investment, Sale Or Redemption, Operating Activity Proceeds From Disposition Of Investment, Sale Or Redemption, Operating Activity Common equity, warrants and other Common Equity and Warrants Common Equity, Warrants and Other [Member] Common Equity, Warrants and Other Auditor Location Audit Information [Abstract] Audit Information Proceeds from principal payments on portfolio investments Proceeds From Disposition Of Investment, Principal Payment, Operating Activity Proceeds From Disposition Of Investment, Principal Payment, Operating Activity Number of portfolio companies Investment Owned, Number Of Portfolio Companies Investment Owned, Number Of Portfolio Companies Tolemar Acquisition, Inc. Tolemar Acquisition, INC. [Member] Tolemar Acquisition, INC. Variable-rate Loans Variable-rate Loans [Member] Variable-rate Loans Interest income: Interest Interest Income, Operating, Paid in Cash Administration fees Administration fees Administrative Fees Expense Security 1 Common [Member] Security 1 Common O 2023 Q1 Aggregate Dividends O 2023 Q1 Aggregate Dividends [Member] O 2023 Q1 Aggregate Dividends Subordinated notes Structured Finance Securities, Subordinated Notes [Member] Structured Finance Securities, Subordinated Notes First lien debt investments First Lien Debt Investments [Member] First Lien Debt Investments Incentive fee, annualized hurdle rate Investment Advisory Agreement, Incentive Fee Rate, Annualized Hurdle Rate [Member] Investment Advisory Agreement, Incentive Fee Rate, Annualized Hurdle Rate Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Cash paid for taxes Total cash paid for income taxes Income Taxes Paid, Net Award Timing Disclosures [Line Items] Net realized losses on investments, net of taxes Realized Gain (Loss), Investment and Derivative, Operating, after Tax Debt outstanding Total Long-Term Debt, Gross Entity Well-known Seasoned Issuer Long-Term Capital Loss Carryforward Long-Term Capital Loss Carryforward [Member] Long-Term Capital Loss Carryforward Spread Above Index Investment, Basis Spread, Variable Rate Capital Transactions Equity [Text Block] Effective interest rate Weighted-Average Effective Interest Rate Debt Instrument, Interest Rate During Period Share of common stock owned (in shares) Investment Owned, Balance, Shares Net increase (decrease) in net assets resulting from operations Net increase (decrease) in net assets resulting from operations Net Income (Loss) Attributable to Parent Subsequent Event [Table] Subsequent Event [Table] Dividends [Domain] Dividends [Domain] Expiration Date Trading Arrangement Expiration Date SSJA Bariatric Management LLC SSJA Bariatric Management LLC [Member] SSJA Bariatric Management LLC Federal Income Tax Note [Table] Federal Income Tax Note [Table] Net investment income per common share - basic (in usd per share) Net investment income (in usd per share) Investment Company, Investment Income (Loss), Per Share, Basic Administrative and Support and Waste Management and Remediation Services Administrative and Support and Waste Management and Remediation Services [Member] Administrative and Support and Waste Management and Remediation Services Inergex Holdings, LLC Inergex Holdings, LLC [Member] Inergex Holdings, LLC Preferred stock, authorized (in shares) Preferred Stock, Shares Authorized Net increase (decrease) in net assets resulting from operations: Net Income (Loss) Attributable to Parent [Abstract] Adoption Date Trading Arrangement Adoption Date Reclassifications Reclassification, Comparability Adjustment [Policy Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Jersey JERSEY Incentive fee, quarterly hurdle rate Investment Advisory Agreement, Incentive Fee Rate, Quarterly Hurdle Rate [Member] Investment Advisory Agreement, Incentive Fee Rate, Quarterly Hurdle Rate Investment percentage Investment Owned, Percentage Investment Owned, Percentage Entity Current Reporting Status Schedule of Investments Investment Holdings, Schedule of Investments [Table Text Block] Banc of California Credit Facility Banc of California Credit Facility [Member] Banc of California Credit Facility Incentive fee percentage Management and Service Fees, Incentive Rate Customer [Axis] Customer [Axis] Interest Rate Investment Interest Rate Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] 8.00 Percent Notes due 2029 [Member] 8.00 Percent Notes due 2029 Line of Credit Line of Credit [Member] Total distributable earnings (accumulated losses) Retained Earnings (Accumulated Deficit) Distributions from tax return of capital (in usd per share) Investment Company, Tax Return of Capital Distribution, Per Share GGC Aerospace Topco L.P. GGC Aerospace Topco L.P. [Member] GGC Aerospace Topco L.P. Consolidated Schedule of Investments In and Advances To Affiliates Investments in and Advances to Affiliates, Schedule of Investments [Text Block] Financial Instrument [Axis] Financial Instrument [Axis] Statement of Financial Position [Abstract] 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] Executive Category: Executive Category [Axis] Percentage of Total, Amortized Cost Investment Owned, Percent Of Amortized Cost Investment Owned, Percent Of Amortized Cost O 2024 Q2 Aggregate Dividends O 2024 Q2 Aggregate Dividends [Member] O 2024 Q2 Aggregate Dividends Average outstanding balance Line of Credit Facility, Average Outstanding Amount SS Acquisition, LLC SS Acquisition, LLC [Member] SS Acquisition, LLC Market approach Valuation, Market Approach [Member] Interest expense Interest Expense, Operating and Nonoperating Current Fiscal Year End 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