Investments - Investments Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands		Mar. 31, 2025		Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total portfolio company investments	[1]	$ 346,824	[2],[3]	$ 359,897	[4],[5]
Derivative instruments		(349)		423
Total investments, including derivative instruments		346,475		360,320
Debt Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total portfolio company investments		304,515		318,838
Warrant Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total portfolio company investments		24,918		24,111
Equity Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total portfolio company investments		17,391		16,948
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total portfolio company investments		0		0
Derivative instruments		0		0
Total investments, including derivative instruments		0		0
Level 1 | Debt Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total portfolio company investments		0		0
Level 1 | Warrant Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total portfolio company investments		0		0
Level 1 | Equity Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total portfolio company investments		0		0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total portfolio company investments		0		0
Derivative instruments		(349)		423
Total investments, including derivative instruments				423
Total investments, including derivative instruments		(349)
Level 2 | Debt Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total portfolio company investments		0		0
Level 2 | Warrant Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total portfolio company investments		0		0
Level 2 | Equity Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total portfolio company investments		0		0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total portfolio company investments		346,824		359,897
Derivative instruments		0		0
Total investments, including derivative instruments		346,824		359,897
Level 3 | Debt Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total portfolio company investments		304,515		318,838
Level 3 | Warrant Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total portfolio company investments		24,918		24,111
Level 3 | Equity Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total portfolio company investments		$ 17,391		$ 16,948

[1] All investments were valued at fair value using Level 3 significant unobservable inputs as determined in good faith by the Company’s board of directors (the “Board”).

[2] Non-income producing investments.

[3] The Company generally acquires its investments in private transactions exempt from registration under the Securities Act of 1933, as amended (the “Securities Act”). Unless otherwise indicated, all of the Company’s portfolio company investments are subject to restrictions on sales. As of March 31, 2025, the Company’s portfolio company investments that were subject to restrictions on sales totaled $346.8 million at fair value and represented 136.1% of the Company’s net assets. In addition, unless otherwise indicated, as of March 31, 2025, all investments are pledged as collateral as part of the Company’s revolving credit facility.

[4] Non-income producing investments.

[5] The Company generally acquires its investments in private transactions exempt from registration under the Securities Act. Unless otherwise indicated, all of the Company’s portfolio company investments are subject to restrictions on sales. As of December 31, 2024, the Company’s portfolio company investments that were subject to restrictions on sales totaled $359.9 million at fair value and represented 136.4% of the Company’s net assets. In addition, unless otherwise indicated, as of December 31, 2024, all investments are pledged as collateral as part of the Company’s revolving credit facility.