Fair Value Measurement - Summary of Reconciliation of Level 3 Assets (Detail) - Fair Value, Inputs, Level 3 [Member] - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Begining Balance	$ 1,300,076,631	$ 1,116,463,627
Purchases (including PIK)	514,674,920	335,263,618
Sales and principal payments	(223,523,588)	(158,155,442)
Realized Gain (Loss)	907,148	(3,930,090)
Net Amortization of Premium/Discount	6,641,027	6,075,530
Transfers In		0
Transfers Out	(2,182,334)	0
Net Change in Unrealized Appreciation (Depreciation)	9,268,026	4,359,388
Ending Balance	1,605,861,830	1,300,076,631
Change in Unrealized Appreciation (Depreciation) for Investments Still Held	12,454,985	192,076
Senior Debt Obligations [Member] | 1st Lien/Senior Secured Debt [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Begining Balance	1,270,762,647	1,088,190,382
Purchases (including PIK)	513,442,490	331,961,677
Sales and principal payments	(216,214,013)	(155,742,027)
Realized Gain (Loss)	733,497	(3,284,325)
Net Amortization of Premium/Discount	6,586,088	6,043,162
Transfers In		0
Transfers Out	0	0
Net Change in Unrealized Appreciation (Depreciation)	6,997,266	3,593,778
Ending Balance	1,582,307,975	1,270,762,647
Change in Unrealized Appreciation (Depreciation) for Investments Still Held	5,470,146	(31,790)
Senior Debt Obligations [Member] | 2nd Lien/Junior Secured Debt [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Begining Balance	9,205,885	10,640,036
Purchases (including PIK)	0	0
Sales and principal payments	(6,537,711)	(1,230,106)
Realized Gain (Loss)	0	0
Net Amortization of Premium/Discount	54,939	32,368
Transfers In		0
Transfers Out	0	0
Net Change in Unrealized Appreciation (Depreciation)	102,284	(236,413)
Ending Balance	2,825,397	9,205,885
Change in Unrealized Appreciation (Depreciation) for Investments Still Held	134,565	(253,588)
Preferred Stock [Member] | Equity Funds [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Begining Balance	8,777,660	9,218,222
Purchases (including PIK)	0	307,380
Sales and principal payments	(771,864)	(838,348)
Realized Gain (Loss)	173,651	(652,009)
Net Amortization of Premium/Discount	0	0
Transfers In		0
Transfers Out	(368,990)	0
Net Change in Unrealized Appreciation (Depreciation)	218,271	742,415
Ending Balance	8,028,728	8,777,660
Change in Unrealized Appreciation (Depreciation) for Investments Still Held	260,473	217,846
Common Stock [Member] | Equity Funds [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Begining Balance	10,039,580	7,420,892
Purchases (including PIK)	1,232,430	2,953,033
Sales and principal payments	0	(344,961)
Realized Gain (Loss)	0	6,244
Net Amortization of Premium/Discount	0	0
Transfers In		0
Transfers Out	(1,813,344)	0
Net Change in Unrealized Appreciation (Depreciation)	1,537,707	4,372
Ending Balance	10,996,373	10,039,580
Change in Unrealized Appreciation (Depreciation) for Investments Still Held	1,542,159	4,372
Warrant [Member] | Equity Funds [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Begining Balance	1,290,859	994,095
Purchases (including PIK)	0	41,528
Sales and principal payments	0	0
Realized Gain (Loss)	0	0
Net Amortization of Premium/Discount		0
Transfers In		0
Transfers Out	0	0
Net Change in Unrealized Appreciation (Depreciation)	412,498	255,236
Ending Balance	1,703,357	1,290,859
Change in Unrealized Appreciation (Depreciation) for Investments Still Held	$ 412,498	$ 255,236