Financial Highlights - Summary of Investment Company, Financial Highlights (Detail) - USD ($) $ / shares in Units, $ in Thousands		6 Months Ended
		Jun. 30, 2025	Jun. 30, 2024
Per Share Data:
Net asset value per Unit, beginning of period	[1]	$ 10.11	$ 10.04
Net investment income	[1]	0.46	0.49
Net realized and unrealized gain (loss)	[1],[2]	(0.3)	0.01
Net increase in Unitholders' capital resulting from operations	[1]	0.16	0.5
Distributions to Unitholders:
From distributable earnings	[1]	(0.46)	(0.19)
From return of capital	[1]	(0.12)	0
Net asset value per unit, end of period	[1]	$ 9.69	$ 10.35
Total Return	[1],[3],[4]	1.58%	4.95%
Unitholders' capital, end of period	[1]	$ 179,582	$ 276,404
Units issued and outstanding at end of period	[1]	18,532,519	26,710,775
Ratios to average net assets of Unitholders' Capital:
Net investment income	[1],[4]	4.60%	4.85%
Operating expenses	[1],[4]	1.33%	1.86%
Interest and other credit facility expenses	[1],[4]	2.63%	2.61%
Total expenses	[1],[4]	3.96%	4.47%
Average debt outstanding	[1],[4]	$ 131,575	$ 155,140
Portfolio turnover ratio	[1],[4]	0.40%	0.70%

[1] Calculated using the average units outstanding method. Weighted average Units outstanding for the six months ended June 30, 2025 and June 30, 2024 were 18,532,519 and 26,710,775, respectively.

[2] Includes the impact of the different Unit amounts used in calculating per Unit data as a result of calculating certain per Unit data based upon the weighted average Units outstanding during the period and certain per Unit data based on the Units outstanding as of a period end.

[3] Calculated as the change in net asset value (“NAV”) per Unit during the period plus distributions declared per Unit, divided by the beginning NAV per Unit. Total return does not include a sales load.

[4] Not annualized for periods less than one year.