Investments - Composition of the Company's Investment Portfolio by Geographic Region, at Amortized Cost and Fair Value (with Corresponding Percentage of Total Portfolio Investments) (Details) - USD ($)

6 Months Ended

12 Months Ended

Jun. 30, 2025

Dec. 31, 2024

Investments

Investment owned, cost

$ 414,808,000

^[1]

$ 495,797,000

^[2],[3]

$ 367,700,000

^[1],[4]

$ 457,048,000

^[2],[3],[5]

Investment Owned, At Cost | Geographic Concentration Risk

Investments

Concentration risk, percentage

100.00%

100.00%

Investment Owned, At Fair Value | Geographic Concentration Risk

Investments

Concentration risk, percentage

100.00%

100.00%

Investments

Investment owned, cost

$ 172,053,000

$ 178,051,000

$ 142,353,000

$ 152,880,000

Midwest | Investment Owned, At Cost | Geographic Concentration Risk

Investments

Concentration risk, percentage

41.50%

35.90%

Midwest | Investment Owned, At Fair Value | Geographic Concentration Risk

Investments

Concentration risk, percentage

38.70%

33.40%

Investments

Investment owned, cost

$ 93,328,000

$ 103,354,000

$ 84,604,000

$ 94,766,000

Northeast | Investment Owned, At Cost | Geographic Concentration Risk

Investments

Concentration risk, percentage

22.50%

20.80%

Northeast | Investment Owned, At Fair Value | Geographic Concentration Risk

Investments

Concentration risk, percentage

23.00%

20.70%

Investments

Investment owned, cost

$ 0

$ 3,928,000

$ 0

$ 4,030,000

Northwest | Investment Owned, At Cost | Geographic Concentration Risk

Investments

Concentration risk, percentage

0.00%

0.80%

Northwest | Investment Owned, At Fair Value | Geographic Concentration Risk

Investments

Concentration risk, percentage

0.00%

0.90%

Investments

Investment owned, cost

$ 71,381,000

$ 116,087,000

$ 64,628,000

$ 111,115,000

Southeast | Investment Owned, At Cost | Geographic Concentration Risk

Investments

Concentration risk, percentage

17.20%

23.50%

Southeast | Investment Owned, At Fair Value | Geographic Concentration Risk

Investments

Concentration risk, percentage

17.60%

24.40%

Investments

Investment owned, cost

$ 8,547,000

$ 12,622,000

$ 8,738,000

$ 13,186,000

Southwest | Investment Owned, At Cost | Geographic Concentration Risk

Investments

Concentration risk, percentage

2.10%

2.50%

Southwest | Investment Owned, At Fair Value | Geographic Concentration Risk

Investments

Concentration risk, percentage

2.40%

2.90%

Investments

Investment owned, cost

$ 69,499,000

$ 81,755,000

$ 66,051,000

$ 79,683,000

West | Investment Owned, At Cost | Geographic Concentration Risk

Investments

Concentration risk, percentage

16.70%

16.50%

West | Investment Owned, At Fair Value | Geographic Concentration Risk

Investments

Concentration risk, percentage

18.00%

17.40%

Investments

Investment owned, cost

$ 0

$ 0

1,326,000

1,388,000

International | One International Portfolio Investment

Investments

Investment owned, cost

$ 0

$ 0

International | Investment Owned, At Cost | Geographic Concentration Risk

Investments

Concentration risk, percentage

0.00%

0.00%

International | Investment Owned, At Fair Value | Geographic Concentration Risk

Investments

Concentration risk, percentage

0.30%

0.30%

[1]	All of the Company’s investments are issued by eligible portfolio companies, as defined in the Investment Company Act of 1940 (the “1940 Act”), unless otherwise noted. All of the Company’s investments are issued by U.S. portfolio companies unless otherwise noted.
[2]	All of the Company’s investments are issued by eligible portfolio companies, as defined in the Investment Company Act of 1940 (the “1940 Act”), unless otherwise noted. All of the Company’s investments are issued by U.S. portfolio companies unless otherwise noted.
[3]	As defined in the 1940 Act, the Company is deemed to be both an “Affiliated Person” of and to “Control” this portfolio company as it owns more than 25% of the portfolio company’s voting securities. See Note 5 in the accompanying notes to the consolidated financial statements for additional information on transactions in which the issuer was both an Affiliated Person and a portfolio company that the Company is deemed to Control.
[4]	Because there is no readily available market value for these investments, the fair value of these investments is determined in good faith using significant unobservable inputs by the Valuation Designee. (See Note 4 in the accompanying notes to the consolidated financial statements).
[5]	Because there is no readily available market value for these investments, the fair value of these investments is determined in good faith using significant unobservable inputs by the Valuation Designee. (See Note 4 in the accompanying notes to the consolidated financial statements)