Agreements and Related Party Transactions - Additional Information (Detail) - USD ($)			3 Months Ended		6 Months Ended
		Oct. 05, 2018	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Agreements And Related Party Transactions [Line Items]
Investment company, total return	[1],[2],[3]				1.58%	4.95%
Percentage of reimbursement of distributions by adviser upon liquidation			100.00%		100.00%
Percentage of cumulative realized capital gains net exceeds					20.00%
Management fee expense			$ 727,000	$ 1,036,000	$ 1,446,000	$ 2,072,000
Administrative fees expense			61,000	81,000	124,000	164,000
Incentive fee expense			$ 268,000	1,028,000	$ 507,000	2,312,000
Investment company committed capital		$ 326,000,000
First, Unitholder Preferred Return [Member]
Agreements And Related Party Transactions [Line Items]
percentage of current proceeds to unitholders					100.00%
Second., Adviser Catch Up [Member]
Agreements And Related Party Transactions [Line Items]
Percentage of total amount distributed to unitholders and advisers					15.00%
Percentage of Current Proceeds to Advisers					80.00%
Third Order of Priority Return of Capital Contributions [Member]
Agreements And Related Party Transactions [Line Items]
Percentage of distribution to unitholders					85.00%
Percentage of distribution to adviser as an incentive fee					15.00%
Capital Commitment Condition One [Member]
Agreements And Related Party Transactions [Line Items]
Investment company committed capital					$ 400,000
Multiplier to capital commitment			0.00000025		0.00000025
Aggregate operating expenses relating to unitholders			$ 1,250		$ 1,250
Capital Commitment Condition Two [Member]
Agreements And Related Party Transactions [Line Items]
Investment company committed capital					400,000
Aggregate operating expenses relating to unitholders			2,250		$ 2,250
First Return Of Capital Contributions [Member]
Agreements And Related Party Transactions [Line Items]
Percentage of disposition proceeds to unitholders					100.00%
Second Unitholder Preferred Return [Member]
Agreements And Related Party Transactions [Line Items]
Percentage of disposition proceeds to unitholders					100.00%
Third Adviser Catch Up [Member]
Agreements And Related Party Transactions [Line Items]
Percentage of disposition proceeds to advisers					80.00%
Percentage of total amount distributed to unitholders and advisers					15.00%
Fourth Order Of Priority Return Of Capital Contributions [Member]
Agreements And Related Party Transactions [Line Items]
Percentage of distribution to unitholders					85.00%
Percentage of distribution to adviser as an incentive fee					15.00%
Minimum [Member] | Second Unitholder Preferred Return [Member]
Agreements And Related Party Transactions [Line Items]
Investment company, total return					6.00%
Advisor [Member]
Agreements And Related Party Transactions [Line Items]
Management fee expense			727,000	1,036,000	$ 1,446,000	2,072,000
Administrative fees expense			61,000	81,000	124,000	164,000
Incentive fee expense			268,000	$ 1,028,000	507,000	$ 2,312,000
Reimbursement of organizational and offering expenses			500,000		500,000
Reimbursement of offering expenses			308,000		308,000
Reimbursement of organizational expenses			$ 84,000		$ 84,000
Management Fee [Member] | Advisor [Member]
Agreements And Related Party Transactions [Line Items]
Related party transaction rate					1.50%
Percentage of payment to placement agent					100.00%
Administration Fee [Member] | Advisor [Member]
Agreements And Related Party Transactions [Line Items]
Related party transaction rate					0.08%

[1] 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.

[2] 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.

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