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Fair Value of Financial Instruments - Summary of Company's Assets Measured at Fair Value by Investment Type on a Recurring Basis (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
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Significant Unobservable Inputs (Level 3) |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Total Investments at fair value | $ 1,344,283 | $ 1,268,428
Fair Value, Recurring |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Total Investments at fair value | 1,363,862 | 1,275,180
Escrow Receivable | 2,441 | 2,441
Cash and cash equivalents | 11,967 | 4,761
Total | 1,378,270 | 1,282,382
Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Total Investments at fair value | 13,607 | 795
Cash and cash equivalents | 11,967 | 4,761
Total | 25,574 | 5,556
Fair Value, Recurring | Significant Other Observable Inputs (Level 2) |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Total Investments at fair value | 1,363 | 2,326
Total | 1,363 | 2,326
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Total Investments at fair value | 1,344,283 | 1,268,428
Escrow Receivable | 2,441 | 2,441
Total | 1,346,724 | 1,270,869
Fair Value, Recurring | Measured at Net Asset Value |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Total Investments at fair value | 4,609 | 3,631
Total | 4,609 | 3,631
Fair Value, Recurring | Secured Loans |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Total Investments at fair value | 1,010,841 | 885,299
Fair Value, Recurring | Secured Loans | Significant Unobservable Inputs (Level 3) |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Total Investments at fair value | 1,010,841 | 885,299
Fair Value, Recurring | Equipment Financing |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Total Investments at fair value | 277,550 | 336,778
Fair Value, Recurring | Equipment Financing | Significant Unobservable Inputs (Level 3) |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Total Investments at fair value | 277,550 | 336,778
Fair Value, Recurring | Warrants |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Total Investments at fair value | 39,930 | 33,527
Fair Value, Recurring | Warrants | Significant Other Observable Inputs (Level 2) |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Total Investments at fair value | 1,363 | 2,326
Fair Value, Recurring | Warrants | Significant Unobservable Inputs (Level 3) |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Total Investments at fair value | 38,567 | 31,201
Fair Value, Recurring | Equity |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Total Investments at fair value | 35,541 | 19,576
Fair Value, Recurring | Equity | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Total Investments at fair value | 13,607 | 795
Fair Value, Recurring | Equity | Significant Unobservable Inputs (Level 3) |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Total Investments at fair value | 17,325 | 15,150
Fair Value, Recurring | Equity | Measured at Net Asset Value |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Total Investments at fair value | $ 4,609 | $ 3,631

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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