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Credit Concentration Risk Credit Concentration Risk [Member] August 1, 2023 Dividend Twenty Seven Declared Date [Member] Dividend Twenty Seven Declared Date [Member] Scenario Plan Eight Scenario Plan Eight [Member] Scenario plan eight. Scenario Two. Scenario Two [Member] Between 10 and 29 Unaffiliated Obligors Oaktree Strategic Relationship Oaktree Strategic Relationship [Member] Oaktree strategic relationship. Debt Instrument, Name Debt Instrument, Name [Domain] Fair Value Hierarchy and NAV Fair Value Hierarchy and NAV [Domain] Qualifying Assets Qualifying Assets [Member] Qualifying Assets [Member] Related Party Transaction Related Party Transaction [Domain] Second Private Offering Second Private Offerings [Member] Second private offerings. Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Level 3 assets measured at fair value Debt instrument, description Debt Instrument, Description Fair Value, Recurring [Member] Measurements Recurring Member Convertible Note Convertible Note [Member] Convertible note. Initial Private Offering Initial Private Offering [Member] Initial private offering. 3-Month SOFR Three Month Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] Three month secured overnight financing rate (SOFR) overnight index swap rate. Additional paid-in capital Additional Paid in Capital, Common Stock Percentage of minimum beneficial ownership of voting securities for control Percentage Of Minimum Beneficial Ownership Of Voting Securities For Control Percentage of minimum beneficial ownership of voting securities for control. Net Assets, Total Net assets at end of period Net assets at beginning of period Net assets at end of period Net Assets U.S. Treasury Bill Total U.S.Treasury US Treasury Securities [Member] Proceeds from reverse repurchase agreements Proceeds From Reverse Repurchase Agreements Proceeds from reverse repurchase agreements. Percentage of minimum pre-incentive fee net investment income accrued Percentage Of Minimum Pre Incentive Fee Net Investment Income Accrued Percentage of pre-Incentive Fee net investment income accrued. Acquisition of treasury shares Payments for Repurchase of Common Stock Investment, Type [Extensible Enumeration] Net Change in Unrealized Gain (Loss) Change in unrealized appreciation (depreciation) of investment. Change in Unrealized Appreciation (Depreciation) of Investment [Member] Principles of Consolidation Consolidation, Policy [Policy Text Block] Weighted average outstanding principal Credit Facility balance Credit facility weighted average amount outstanding. Credit Facility Weighted Average Amount Outstanding Transfers out of Level 3. Transfers out of Level 3 [Member] Transfers out of Level 3 Investment company return from accretion dilution. Investment Company Return From Accretion Dilution Return from accretion (dilution) Schedule of components of distributable earnings on tax basis table text block. Schedule Of Components Of Distributable Earnings On Tax Basis Table Text Block Summary of Components of Distributable Earnings on a Tax Basis Basic and diluted income per common share Earnings Per Share Reconciliation [Abstract] Entity Address, Postal Zip Code Health Care Technology Health Care Technology [Member] Health care technology. Investment Interest Cash Cap Investment Interest Cash Cap Investment interest cash cap. Advertising Advertising Sector [Member] Advertising sector. Discount Rate Measurement Input, Discount Rate [Member] Dividend Declared Dividend Declared [Member] Credit Facility Credit Facility [Domain] Tranche VI Debt Tranche Six [Member] Debt tranche six. Revision of Prior Period, Adjustment [Member] Revision of Prior Period, Adjustment Percentage of common stock shares issued and outstanding Percentage Of Common Stock Shares Issued And Outstanding Percentage of common stock shares issued and outstanding. Summary of tax differences primarily related to non-deductible excise taxes paid. Summary of Tax Differences Primarily Related to Non-deductible Excise Taxes Paid [Table Text Block] Schedule of Tax Differences Primarily Related to Non-Deductible Excise Taxes Paid Percentage of quarterly base management fee Percentage Of Quarterly Base Management Fee Percentage of quarterly base management fee. Equity [Abstract] Route 92 Medical, Inc. Route Ninety Two Medical Incorporation [Member] Route Ninety Two Medical, Incorporation. Synack, Inc. Synack Incorporation [Member] Synack Incorporation. Entity Well-Known Seasoned Issuer Revision of Prior Period [Axis] Debt Instrument, Payment Terms Debt instrument, payment terms Schedule of Transactions Related to Company's Affiliate and Control Investments Schedule of Investments in and Advances to Affiliates, Schedule of Investments [Table Text Block] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Realized loss Net Realized Gain (Loss) Investments in and Advances to Affiliates, at Fair Value, Period Increase (Decrease), Total Net Realized Gains (Losses) Seven Point Five Zero Percentage Notes Due Two Thousand Twenty Seven [Member] Seven Point Five Zero Percentage Notes Due Two Thousand Twenty Seven [Member] 7.50% Notes due 2027 Schedule of Financial Highlights Investment Company, Financial Highlights [Table Text Block] Schedule of  income taxes disclosure. Income Taxes Disclosure [Table] Kin Insurance, Inc. Kin Insurance Incorporation [Member] Kin Insurance Incorporation. Moximed, Inc. Moximed Incorporation [Member] Moximed Incorporation. Equity Components Equity Components [Axis] Placement Agent Fees Placement agent fees Placement agent fees. Supplemental fees Supplemental Fees of Unused Facility and Other Debt Supplemental fees of unused facility and other debt. Scenario Plan Six Scenario Plan Six [Member] Scenario plan six. 3PL Central LLC (dba Extensiv) 3PL central limited liability company member. 3PL Central Limited Liability Company [Member] Original issue discount Debt Securities Held To Maturity Accrual Original Issue Discount Debt securities held to maturity accrual original issue discount. Interest and fees receivable Dividend and Interest Receivable Tranche IV Debt Tranche Four [Member] Debt, tranche four. Local Phone Number Sale of Stock Sale of Stock [Axis] Net Assets Net Assets [Member] Net assets. Deferred Incentive Fees, Less than 1 Year Deferred Incentive Fees, to be Paid, Year One Deferred incentive fees, to be paid, year one. Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Statement of Cash Flows [Abstract] Comprehensive Income Comprehensive Income, Policy [Policy Text Block] Commitments, 3-5 years Contractual Obligation, to be Paid, Year Four and Five Contractual Obligation, to be Paid, Year Four and Five, Total Income Tax Authority [Domain] Dividend fourteen declared date. Dividend Fourteen Declared Date [Member] March 4, 2021 Organization, Consolidation and Presentation of Financial Statements [Abstract] Capital Loss Carryforward [Member] Capital Loss Carryforward Concentration Risk Benchmark [Axis] Other income Other Income Third-party service provider Third Party Service Provider [Member] Third party service provider Common stock, par value Common Stock, Par or Stated Value Per Share Aggregate commitment amount Line of Credit Facility, Maximum Amount Outstanding During Period Future subscription line of credit Accrued expenses Accrued Professional Fees Scenario, 20% of portion of pre-incentive fee net income that is over 2.667% Scenario, 20% of portion of pre-incentive fee net income that is over 2.667%. Scenario, 20% of Portion of Pre-incentive Fee Net Income that is Over Two Point Six Six Seven Percent [Member] Affiliated Entity Affiliated Entity [Member] Debt instrument, interest rate stated percentage Debt Instrument, Interest Rate, Stated Percentage Rate Dividend twenty declared date. Dividend Twenty Declared Date [Member] July 28, 2022 Deferred incentive fees Deferred Incentive Fees Deferred incentive fees, Sales or Prepayments of investments Sales or Prepayments of investments [Member] Sales or prepayments of investments. Maximum Maximum [Member] Dividend four declared date. Dividend Four Declared Date [Member] March 22, 2019 Education Services Education Services [Member] Education services. Credit Agreement Credit Agreement [Member] Credit agreement. Dtex Systems, Inc. Dtex Systems Incorporation [Member] Dtex Systems, Incorporation. Scheduled Principal Repayments of Investments Scheduled Principal Repayments of Investments [Member] Scheduled principal repayments of investments. Commitments, Less than 1 Year Contractual Obligation, to be Paid, Year One Interest payable Interest Payable Summary of tax character of distributions paid. Summary of Tax Character of Distributions Paid [Table Text Block] Summary of Tax Character of Distributions Paid Related Party Transaction Related Party Transaction [Axis] Organization Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] South Central United States South Central United States [Member] South Central United States. Percentage of base management fee Percentage Of Base Management Fee Percentage of base management fee. Dividends paid to stockholders Payments of Dividends, Total Dividends paid to shareholders Payments of Dividends Level 3 Fair Value, Inputs, Level 3 [Member] Percentage of beneficial ownership of voting securities for affiliation Percentage of Beneficial Ownership of Voting Securities for Affiliation Percentage of beneficial ownership of voting securities for affiliation. Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value, Recurring and Nonrecurring [Table] Portfolio turnover rate Investment Company, Portfolio Turnover Ownership [Domain] Net increase (decrease) in cash and cash equivalents Net increase (decrease) in cash Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Percentage of minimum net ordinary income and net short-term capital gains in excess of net long-term capital losses for distribution. Percentage of Minimum Net Ordinary Income and Net Short-term Capital Gains in excess of Net Long-term Capital Losses for Distribution Percentage of minimum net ordinary income and net short-term capital gains in excess of net long-term capital losses for distribution Document Financial Statement Error Correction Increase (decrease) in incentive fees payable Increase (Decrease) in Incentive Fee Payable Debt Securities, Held-to-Maturity, Nonaccrual Aggregate principal funded on non-accrual status City Area Code Cash flows from operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] Document Information [Line Items] Investment Ceiling Rate Investment Interest Rate Ceiling Investment interest rate ceiling. OCM Growth Holding, LLC OCM Growth Holdings, LLC [Member] OCM Growth Holdings, LLC. Gain (Loss) on Investments Net realized and unrealized gain (loss) on investments Investment Company, Financial Highlights [Abstract] Proceeds from Notes Proceeds from Issuance of Unsecured Debt Weighted average shares outstanding, Basic Weighted Average Number of Shares Outstanding, Basic, Total Basic Weighted Average Number of Shares Outstanding, Basic Scenario, Plan Scenario, Plan [Member] Credit facility - CIBC. Credit Facility - CIBC [Member] Credit Facility - CIBC Net investment income per common share (basic and diluted) Net investment income Investment Company, Investment Income (Loss), Per Share Cash flows from financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Stock issued during period, shares, dividend reinvestment plan Reinvestment of dividends, Shares Stock Issued During Period, Shares, Dividend Reinvestment Plan Scenario, Pre-incentive fee net income less than 2.0%. Scenario, Pre-incentive Fee Net Income Less Than Two Percentage [Member] Scenario, Pre-incentive fee net income less than 2.0% Debt instrument, redemption price per share Debt Instrument, Redemption Price Per Share Debt instrument, redemption price per share. Statement [Table] Statement [Table] Percentage of aggregate cumulative realized capital gains Percentage Of Aggregate Cumulative Realized Capital Gains Percentage of aggregate cumulative realized capital gains. Schedule Of Related Party Transactions By Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Deferred Incentive Fees Deferred Incentive Fees Incentive Fee Payable Incentive fees payable Investment Classification Investment, Policy [Policy Text Block] United Kingdom UNITED KINGDOM Mojix Inc Mojix Inc [Member] Mojix, Inc. Related Party Agreements and Transactions Related Party Transactions Disclosure [Text Block] Statement [Line Items] Statement [Line Items] Revolving loan agreement. Revolving Loan Agreement [Member] Committed Facility Net realized gains (loss) Realized Gain (Loss), Investment and Derivative, Operating, before Tax, Total Realized Gain (Loss), Investment and Derivative, Operating, before Tax Net realized gain/(loss) Scenario Plan Ten Scenario Plan Ten [Member] Scenario plan ten. Related party agreements and transactions effective date Related Party Agreements And Transactions Effective Date Related party agreements and transactions effective date. Capital loss carryforward amount subject to offset realized capital gains. Capital Loss Carryforward Amount Subject To Offset Realized Capital Gains Capital loss carryforward amount utilized to offset realized capital gains Schedule of Borrowings Schedule of Long-Term Debt Instruments [Table Text Block] Eight point zero zero percentage notes due two thousand twenty seven. Eight Point Zero Zero Percentage Notes Due Two Thousand Twenty Seven [Member] 8.00% Notes due 2027 Debt Instrument, Fair Value Disclosure, Total Debt Instrument, Fair Value Disclosure Debt instrument, fair value Two Thousand Twenty Seven Senior Notes [Member] Two Thousand Twenty Seven Senior Notes [Member] 2027 Senior Notes Scenario Plan Nine Scenario Plan Nine [Member] Scenario plan nine. Subsequent Event [Line Items] Subsequent Event [Line Items] Warrants Warrant Warrant [Member] Percentage of taxable income paid excise tax. Percentage of Taxable Income Paid Excise Tax Payment of excise tax percentage Variable advance rate Debt Instrument Variable Advance Rate Debt instrument variable advance rate. Asset Class Asset Class [Domain] Northwestern United States North Western United States [Member] North-western United States. Equity securities, measurement input Equity Securities, FV-NI, Measurement Input Common Stocks Common Stock Common Stock, par value $0.01 per share Debt Instrument [Line Items] Debt Instrument [Line Items] Other Commitments [Table] Debt instrument covenant, net proceeds of sales of equity interests minimum percentage. Debt Instrument Covenant, Net Proceeds of Sales of Equity Interests Minimum Percentage Debt instrument covenant, net proceeds of sales of equity interests minimum percentage Warrant, expiration date Warrants and Rights Outstanding, Maturity Date Deferred Incentive Fees, More than 5 Years Deferred Incentive Fees, To Be Paid, After Year Five Deferred incentive fees, to be paid, after year five. Southeastern United States South Eastern United States [Member] South-eastern United States. Investments Investment [Text Block] Stock issued during period, value, dividend reinvestment plan Reinvestment of dividends, value Stock Issued During Period, Value, Dividend Reinvestment Plan Cash and Cash Equivalents, at Carrying Value, Total Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Investment Interest Cash Cap Investment, Interest Rate, Paid in Cash Stock repurchase program, authorized amount Stock repurchased during period, value Stock Repurchased During Period, Value Total return based on market value Investment Company Return Market Value Investment company return market value. Net realized gain (loss) on investments, including U.S. Treasury Bills Net realized (gain) loss on investments Net realized gain (loss) on investments Realized Investment Gains (Losses) Risk-free Interest Rate Measurement Input, Risk Free Interest Rate [Member] Amortization of fixed income premiums or accretion of discounts Accretion (Amortization) of Discounts and Premiums, Investments Tranche III Debt Tranche Three [Member] Debt, tranche three. Valuation of Investments Valuation Of Investments [Policy Text Block] Valuation of investments. Investment Valuation Techniques Fair Value of Financial Instruments, Policy [Policy Text Block] Total return based on net asset value Investment Company, Total Return Professional fees Professional Fees Principal/ Shares Investment Owned, Balance, Shares Dividends [Domain] Debt instrument covenant, minimum tangible net worth. Debt Instrument Covenant, Minimum Tangible Net Worth Debt instrument covenant, minimum tangible net worth Senior Secured Term Loan Senior Secured Term Loans [Member] Senior secured term loans. Senior Secured Term Loans Maturity Date Investment Due Date Investment Maturity Date Noncash or Part Noncash Acquisition, Value of Assets Acquired, Total Noncash or Part Noncash Acquisition, Value of Assets Acquired Non-cash portfolio purchases Fair value on non-accrual status Fair Value, Option, Loans Held as Assets, Aggregate Amount in Nonaccrual Status Income Taxes Paid, Net, Total Taxes paid Income Taxes Paid, Net Sale of Stock Sale of Stock [Domain] Base management fees Base Management Fees Base management fees. Preferred Stocks Preferred Stock Preferred Stock [Member] Bombora, Inc. Bombora Incorporation [Member] Bombora incorporation. Scenario more than one billion. Scenario More Than One Billion [Member] Scenario, more than $1B Western United States Western United States [Member] Western United States. Option Pricing Model Valuation Technique, Option Pricing Model [Member] Domestic Tax Authority [Member] U.S. Federal Income Tax Dividend fifteen declared date. Dividend Fifteen Declared Date [Member] April 29, 2021 Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Gross Investment Income, Operating Total investment income Total investment income Dividend eleven declared date. Dividend Eleven Declared Date [Member] May 7, 2020 Industry Sector Industry Sector [Axis] Line of Credit Facility, Interest Rate at Period End Line of credit facility, interest rate percentage Technology Hardware Storage and Peripherals Technology Hardware Storage And Peripherals [Member] Technology hardware, storage and peripherals. Acquisition of treasury shares Treasury shares acquired Acquisition of treasury shares Treasury shares acquired Treasury Stock, Shares, Acquired Credit Facility [Member] Credit Facility. Credit Facility 2027 Notes Two Thousand Twenty Seven Notes [Member] Two Thousand Twenty Seven Notes. Financial Instrument [Axis] Warrants outstanding, term Warrants and Rights Outstanding, Term Line of Credit Facility, Commitment Fee Amount Total Commitment Commitment fee amount Entity Emerging Growth Company Scenario, 80% of the portion of pre-incentive fee net income that is between 2.0% and 2.667%. Scenario, Eight Percent of Portion of Pre-incentive Fee Net Income That is Between Two Percent and Two Point Six Six Seven Percent [Member]" Scenario, 80% of the portion of pre-incentive fee net income that is between 2.0% and 2.667% Amendment Flag Interest Income, Operating, Paid in Kind Payment in-kind interest income Payment in-kind interest Net realized and net change in unrealized gain (loss) on investments Gain (Loss), Investment and Derivative, Operating, and Foreign Currency Transaction, before Tax [Abstract] Dividend one declared date. Dividend One Declared Date [Member] May 3, 2018 Unfunded loan commitments Total unused commitments to extend financing Investment Company, Financial Support to Investee Contractually Required, Not Provided, Amount PWERM Valuation Technique Probability Weighted Expected Return Models [Member] Valuation technique probability weighted expected return models . Debt instrument covenant, minimum interest coverage ratio. Debt Instrument Covenant, Minimum Interest Coverage Ratio Debt instrument covenant, minimum interest coverage ratio IPO IPO [Member] August 1, 2023 Dividend Twenty Six Declared Date [Member] Dividend Twenty Six Declared Date. Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Risks Related To RIC Tax Treatment [Member] Risks related to RIC tax treatment. Oaktree Opportunities Fund Xb Holding, L.P. Oaktree Opportunities Fund Xb Holdings, L.P. [Member] Oaktree Opportunities Fund Xb Holdings, L.P. Total from investment operations Investment Company, Investment Income (Loss) from Operations, Per Share Proceeds from Lines of Credit, Total Borrowings under credit facilities Proceeds from Lines of Credit Net proceeds of sales of equity interests Investments, All Other Investments [Abstract] Incentive fee hurdle rate Incentive Fee Hurdle Rate Incentive fee hurdle rate. Schedule of Level 3 Assets measured at Fair Value Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Variable Rate Variable Rate [Domain] Investment, Interest Rate, Floor Investment Floor Rate Supplemental distribution payable amount per share. Supplemental Distribution Payable Amount Per Share Supplemental distribution Payable in Cash Payable in Cash [Member] Payable in cash. Entity File Number Expiration date Line of credit facility, expiration date Line of Credit Facility, Expiration Date Tranche II Debt Tranche Two [Member] Debt, tranche two. Scheduled Repayments of Investments Scheduled Repayments of Investments [Member] Scheduled repayments of investments. Scenario more than five hundered million but less than one billion. Scenario More Than Five Hundered Million But Less Than One Billion [Member] Scenario, more than $500M but less than $1B Senior Subordinated Loans [Member] Second Lien Term Loans Net investment income Net investment income Net Investment Income 1-Month SOFR One Month Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] One month secured overnight financing rate (SOFR) overnight index swap rate. Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Total Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Ratio/Supplemental Data: Investment Company, Financial Ratios [Abstract] Cash Equivalents Cash Equivalents [Member] Debt securities, measurement input Debt Instrument, Measurement Input Other Assets, Total Other Assets Other assets Schedule of Fair Value of Portfolio of Investment, excluding U.S. Treasury Bills by Geographic Region and Industry Summary Investment Holdings [Table Text Block] Warrants outstanding, measurement input Warrants and Rights Outstanding, Measurement Input Biotechnology Biotechnology [Member] Biotechnology. Initial and Second Private Offering Initial And Second Private Offering [Member] Initial and second private offering. Germany GERMANY Percentage of investment portfolio on non-accrual status Debt Securities Held to Maturity Percentage of Investment Portfolio Nonaccrual Debt securities held to maturity percentage of investment portfolio nonaccrual. Debt Instrument Asset transfer out of level 3 into level 2 fair value Fair Value Assets Transfer Out Of Level3 Into Level2 Amount Fair value assets transfer out of level 3 into level 2 amount. Gross Reductions Gross Reductions Investments in and Advances to Affiliates, at Fair Value, Gross Reductions Total operating expenses Operating Expenses Total operating expenses Computer and Electronics Retail Computer And Electronics Retail [Member] Computer and electronics retail. Weighted average net assets Weighted Average Net Assets Weighted average net assets. Equity Interest Equity Interest [Member] Equity interest. Percentage of minimum board representation for control. Percentage Of Minimum Board Representation For Control Percentage of minimum board representation for control Accrued expenses and other liabilities Accrued Liabilities and Other Liabilities Entity Address, Address Line Two 2026 Senior Notes Two Thousand Twenty Six Senior Notes [Member] Two thousand twenty six senior notes. Title of Individual Title of Individual [Axis] Investment Type Investment Type [Axis] Dividends Payable [Line Items] Unused commitment fees percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Warrant, exercise price Class of Warrant or Right, Exercise Price of Warrants or Rights Runway Growth Holdings LLC Runway Growth Holdings L L C [Member] Runway Growth Holdings LLC. Investment unaffiliated excluding US treasury bills. Investment Unaffiliated Excluding U S Treasury Bills [Member] From Non-controlled/ Non-affiliated Investments Excluding US Treasury Bills Initial Acquisition Date Investment, Acquisition Date Line of credit facility average utilization percentage. Line Of Credit Facility Average Utilization Percentage Line of credit facility average utilization percentage Entity Address, Address Line One Investment Income, Operating, Tax Expense (Benefit) Tax expense Investment company accretion dilution per share. Investment Company Accretion Dilution Per Share Accretion (dilution) Commitments Commitments Contractual Obligation Change in Unrealized Gain (loss) on Level 3 Investments Still Held Change in Unrealized Appreciation (Depreciation) on Level 3 Investments Still Held [Member] Change in Unrealized Appreciation (Depreciation) on Level 3 Investments Still Held [Member] Average Industry Volatility Measurement Input, Price Volatility [Member] February 23, 2023 Dividend Twenty Two Declared Date [Member] Dividend twenty two declared date. SetPoint Medical Corporation Set Point Medical Corporation [Member] SetPoint Medical Corporation. Financial Highlights Investment Company, Financial Highlights [Text Block] Dividend eight declared date. Dividend Eight Declared Date [Member] September 27, 2019 Subsequent Event Type Subsequent Event Type [Domain] Overhead allocation expense Overhead Allocation Expense [Member] Overhead allocation expense Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs Offering cost Offering costs Percentage of minimum net ordinary income for each calendar for distribution Percentage Of Minimum Net Ordinary Income For Each Calendar For Distribution Percentage of minimum net ordinary income for each calendar for distribution. Income Statement Location [Axis] Internet Software and Services Internet Software And Services [Member] Internet software and services. Non-control / Non-affiliate Investments Non Control Or Non Affiliate Investments [Member] Non-control or non-affiliate investments. Incentive fees Incentive Fee Expense Investment income Investment Income, Net [Abstract] Long-Term Debt, Type Long-Term Debt, Type [Axis] MarleySpoon SE MarleySpoon SE [Member] MarleySpoon SE. Incentive fees earned and payable in cash Incentive Fees Earned And Payable In Cash Incentive fees earned and payable in cash. Stockholders' Equity, Policy [Policy Text Block] Distributions Debt instrument, frequency of periodic payment Debt Instrument, Frequency of Periodic Payment Level 2 Fair Value, Inputs, Level 2 [Member] Dividends Paid In Cash Dividends Paid In Cash [Member] Dividends paid in cash Capital gains incentive fee accrued Capital Gains Incentive Fee Accrued Capital gains incentive fee accrued. Dividends Payable [Table] Percentage of minimum capital gains exceed capital losses for distribution for one year period Percentage Of Minimum Capital Gains Exceed Capital Losses For Distribution For One Year Period Percentage of minimum capital gains exceed capital losses for distribution for one year period. Principal Borrowings Debt instrument, outstanding balance Amount outstanding Investment Company, Investment Income (Loss) Ratio Ratio of net investment income to average net assets Acquisition of treasury shares, value Acquisition of treasury shares, value Treasury Stock, Value, Acquired, Cost Method Risk-Free Rate Measurement Input Risk-Free Rate [Member] Measurement input risk-free rate. Management fees Management Fee Expense Investment, Tax Basis, Cost Tax cost of investments Tax Cost of Investments Line of credit, commitment facility amount increased. Line of Credit, Commitment Facility Amount Increased Line of credit, commitment facility amount increased Debt Instrument, Covenant Description Covenant description Industry Sector Industry Sector [Domain] Dividend nineteen declared date. Dividend Nineteen Declared Date [Member] April 28, 2022 PRIME Prime Rate [Member] Tranche I Debt Tranche One [Member] Debt, tranche one. Investment Valuation Techniques Investment Valuation Techniques [Policy Text Block] Investment valuation techniques. Investments Investments [Domain] Adjustments to Additional Paid in Capital, Dividends in Excess of Retained Earnings Additional paid-in capital Second Amended and Restated Fee Letter. Second Amended and Restated Fee Letter [Member] Second Amended and Restated Fee Letter Cumulative interest on investments Debt Securities, Held-to-Maturity, Nonaccrual, Interest Income Total interest Schedule Of Investments [Table] Schedule of Investments [Table] Schedule Of Investments [Line Items] Schedule of Investments [Line Items] Unused fees and other debt fees. Unused Fees and Other Debt Fees Unused Facility and Other Fees Dividends paid to shareholders Investment Company, Distribution, Ordinary Income Ordinary income Treasury Stock Treasury Stock, Common [Member] Investment Company, Distribution, Long-Term Capital Gain Long-term capital gain Nalu Medical Incorporation [Member] Nalu Medical Incorporation. Nalu Medical, Inc. Non-Accrual of Investments Non Accrual Of Investments [Policy Text Block] Non-accrual of investments. Amortization of Deferred Debt Costs Amortization of deferred debt costs Amortization of Debt Issuance Costs Non-Accrual of Investments Loans and Leases Receivable, Nonaccrual Loan and Lease Status, Policy [Policy Text Block] Carrying Value Long-Term Line of Credit, Total Credit facility, outstanding balance Credit facility Segments Segment Reporting, Policy [Policy Text Block] Incentive fees accrued and generated from deferred interest Incentive Fees Accrued And Generated From Deferred Interest Incentive fees accrued and generated from deferred interest. Common stock initial capital commitment Common Stock Initial Capital Commitment Common stock initial capital commitment. Concentration Risk [Table] Percentage of beneficial ownership of voting securities Percentage Of Beneficial Ownership Of Voting Securities Percentage of beneficial ownership of voting securities. Subsequent Event [Table] Subsequent Event [Table] Percentage of common stock initial capital commitment Percentage Of Common Stock Initial Capital Commitment Percentage of common stock initial capital commitment. Affiliate Investments Affiliate Investments [Member] Affiliate investments. From Affiliated Investments Gross Additions Investments in and Advances to Affiliates, at Fair Value, Gross Additions Debt instrument covenant, minimum asset coverage ratio. Debt Instrument Covenant, Minimum Asset Coverage Ratio Debt instrument covenant, minimum asset coverage ratio Cash and Cash Equivalents [Axis] Revelle Aesthetics, Inc. Revelle Aesthetics Incorporation [Member] Revelle Aesthetics, Incorporation. Tax Cost Basis and Estimated Aggregate Gross Unrealized Gain (Loss) on Investments for Federal Income Tax Purposes Federal Income Tax Note [Table Text Block] Common stock, shares outstanding Shares of common stock outstanding ($0.01 par value, 100,000,000 shares authorized) Common Stock, Shares, Outstanding Beginning balance, Shares Ending balance, Shares Dividend two declared date. Dividend Two Declared Date [Member] July 26, 2018 Betterment Holdings, Inc. Betterment Holdings Inc [Member] Betterment holdings inc. Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Investment company, distributable earnings (loss) other accumulated gain (loss). Investment Company, Distributable Earnings (Loss), Other Accumulated Gain (Loss) Other accumulated losses Percentage of adjusted pre-incentive fee net investment income Percentage Of Adjusted Pre Incentive Fee Net Investment Income Percentage of adjusted pre-incentive fee net investment income. Borrowings. Borrowing [Member] Borrowings Investment, Identifier [Axis] Risks Related To The Economy [Member] Risks related to the economy. Tax Credit Carryforward [Axis] Unamortized deferred debt costs Unamortized deferred financing costs Unamortized Debt Issuance Expense Unamortized deferred debt costs Investment in Portfolio Companies Investment in Portfolio Companies [Member] Investment in portfolio companies. Administration Agreement Administration Agreement [Member] Administration agreement. Concentration Risk Type [Domain] Revenue Multiples Measurement Input, Revenue Multiple [Member] Income Statement Location [Domain] Refunds (payments) of offering costs Payments Of Refunds Of Stock Issuance Costs Payments of refunds of stock issuance costs Dividend Paid Dividend Paid [Member] Document Type Ownership [Axis] PIK Income as a % of net investment income Payment-In-Kind Income as Percentage of Net Investment Income Payment-in-kind income as percentage of net investment income. Commitments available under facility Line of Credit Facility, Current Borrowing Capacity Investment interest rate Investment Interest Rate Line of credit facility, interest rate description Line of Credit Facility, Interest Rate Description Net asset value per share Net Asset Value Per Share, Ending Balance Net Asset Value Per Share, Beginning Balance Unsecured Debt Unsecured Debt [Member] May 2, 2023 Dividend Twenty Four Declared Date Member Dividend Twenty Four Declared Date Member Net cash (used in) provided by financing activities Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Schedule of Unfunded Commitments to Extend Financing Schedule of Unfunded Commitments to Extend Financing [Table Text Block] Schedule of unfunded commitments to extend financing. Scenario Eighty Percent of Portion of Pre Incentive Fee Net Income That is Between Two Percent and Two Point Six Six Seven Percent [Member] Scenario Eighty Percent of Portion of Pre Incentive Fee Net Income That is Between Two Percent and Two Point Six Six Seven Percent [Member] Scenario, 80% of the portion of pre-incentive fee net income that is between 2.0% and 2.667% Blueshift Labs, Inc. Blueshift Labs, Inc.[Member] Blueshift labs, Inc. Supplemental and non-cash financing cash flow information: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] (Increase) decrease in interest and fees receivable Increase (Decrease) in Accrued Interest Receivable, Net Dividend seventeen declared date. Dividend Seventeen Declared Date [Member] October 28, 2021 Dividend twenty one declared date. Dividend Twenty One Declared Date [Member] October 27, 2022 Variable Rate Variable Rate [Axis] Investment Company, Tax Return of Capital Distribution Return of capital Tax reclassification Investment company offering costs per share. Investment Company Offering Costs Per Share Offering costs Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Summary of significant accounting policies. Number of fees components Number Of Fees Components Number of fees components. Asset Class Asset Class [Axis] Tranche V Debt Tranche Five [Member] Debt tranche five. Percentage of incentive fee annual catch-up hurdle rate. Percentage of Incentive Fee Annual Catch-up Hurdle Rate Percentage of incentive fee annual catch-up hurdle rate Total liabilities Liabilities Allurion Technologies, Inc. Allurion Technologies Incorporation [Member] Allurion Technologies, Incorporation. Percentage of base management fee Management and Service Fees, Base Rate Dividend eighteen declared date. Dividend Eighteen Declared Date [Member] February 24, 2022 Total net assets Net assets at end of period Equity, Attributable to Parent Beginning balance Ending balance 3-Month SOFR SOFR Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] Dividends Payable, Date to be Paid Payment Date Dividends payable date Consolidated Entities [Axis] Secondary Transactions Secondary Transactions [Member] Secondary transactions. Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] Summary of significant accounting policies. Net increase in net assets resulting from operations Net increase in net assets resulting from operations Fee Income Fee income Scenario One. Scenario One [Member] 9 or Fewer Unaffiliated Obligors Total Interest and Other Debt Financing Expenses Total Interest and Other Debt Financing Expenses Interest Expense Line of credit facility minimum earnings fee percentage. Line of Credit Facility Minimum Earnings Fee Percentage Line of credit facility minimum earnings fee percentage Cash and Cash Equivalents [Domain] Type Dividends Payable, Nature Advisory Agreement Advisory Agreement [Member] Advisory agreement. Maximum Qualifying Assets [Member] Maximum Qualifying Assets [Member] Maximum Qualifying assets. Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] Statement of Financial Position [Abstract] Weighted average shares outstanding, Diluted Weighted Average Number of Shares Outstanding, Diluted, Total Diluted Weighted Average Number of Shares Outstanding, Diluted Debt instrument redemption description Debt Instrument, Redemption, Description Commitments, More than 5 Years Contractual Obligation, to be Paid, after Year Five Net unrealized gain (loss) on a tax basis Net unrealized gain (loss) on a tax basis Net change in unrealized appreciation (depreciation) on a tax basis Credit Facility Credit Facility [Axis] Shares Issued, Price Per Share Offering price Percentage of Net Assets Percentage of Net Assets Investment Owned, Net Assets, Percentage Other expenses Other Expenses Use of Estimates Use of Estimates, Policy [Policy Text Block] Dividend twelve declared date. Dividend Twelve Declared Date [Member] August 5, 2020 Income Tax Disclosure [Text Block] Income Taxes Administrator reimbursed and accrued related to overhead allocation expense Administrator Reimbursed And Accrued Related To Overhead Allocation Expense Administrator reimbursed and accrued related to overhead allocation expense. Investment On Board Representation Investment on board representation. Investment owned from voting securities Dividend seven declared date. Dividend Seven Declared Date [Member] July 30, 2019 Schedule of Dividends Payable [Table Text Block] Summary of Distributions Declared and Paid Total Fair value of Investments Fair Value of Investments [Member] Fair value of investments. Interest Expense, Debt, Excluding Amortization Interest Expense Valuation Approach and Technique Valuation Approach and Technique [Axis] Income Tax Authority [Axis] Fair Value Disclosures [Abstract] December 2027 Notes. December Two Thousand Twenty Seven Notes [Member] December 2027 Notes Fair Value Hierarchy and NAV Fair Value Hierarchy and NAV [Axis] Measurement Frequency [Domain] Accumulated earnings/(deficit) on a tax basis Distributable Earnings Tax Basis Distributable earnings tax basis. Northeastern United States North Eastern United States [Member] North-eastern United States. Line of credit facility federal funds rate. Line of Credit Facility Federal Funds Rate Line of credit facility federal funds rate Revision of Prior Period [Domain] Principle repayments received Proceeds from Sale of Investment Projects Issuance of common stock, Shares Stock Issued During Period, Shares, New Issues May 2, 2023 Dividend Twenty Five Declared Date Member Dividend Twenty Five Declared Date Member Income Tax Disclosure [Abstract] Tax Credit Carryforward, Name [Domain] Investment Company, Financial Highlights [Table] Number of loans Number Of Loans Number of loans. Percentage of assets represent of total assets Investment Owned Percent Of Total Assets Investment owned percent of total assets.