PORTFOLIO INVESTMENTS AND FAIR VALUE - Aggregate Values of Level 3 Portfolio Investments Change (Details) - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value at beginning of period	$ 874,460,683	$ 844,733,638	$ 844,733,638
Purchases of investments	112,624,812		187,469,608
Payment-in-kind interest	2,490,856		3,799,843
Sales and redemptions	(88,189,090)		(137,816,595)
Realized (losses) gains	$ (21,796,232)		$ (29,882,026)
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Realized Investment Gains (Losses)		Realized Investment Gains (Losses)
Amortization of premium and accretion of discount, net	$ 2,045,992	2,078,183	$ 2,749,543
Fair value at end of period	908,718,893		874,460,683
Level 3 transfers	0		0
Operating Income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Change in unrealized (depreciation) appreciation included in earnings	26,435,927		2,792,152
Foreign Currency
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Change in unrealized appreciation on foreign currency included in earnings	645,945		614,520
Senior SecuredLoans-First Lien
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value at beginning of period	774,789,320	735,555,508	735,555,508
Purchases of investments	109,102,232		174,156,432
Payment-in-kind interest	2,114,092		3,185,845
Sales and redemptions	(70,606,161)		(125,442,776)
Realized (losses) gains	(1,580,768)		(11,200,184)
Amortization of premium and accretion of discount, net	1,983,421		2,591,838
Fair value at end of period	813,032,551		774,789,320
Senior SecuredLoans-First Lien | Operating Income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Change in unrealized (depreciation) appreciation included in earnings	(3,413,083)		(4,667,866)
Senior SecuredLoans-First Lien | Foreign Currency
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Change in unrealized appreciation on foreign currency included in earnings	643,498		610,523
Senior Secured Loans-Second Lien
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value at beginning of period	21,957,500	45,304,300	45,304,300
Sales and redemptions	(9,782,348)		(9,882,105)
Realized (losses) gains	(20,475,000)		(17,979,749)
Amortization of premium and accretion of discount, net	51,366		141,943
Fair value at end of period	11,933,275		21,957,500
Senior Secured Loans-Second Lien | Operating Income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Change in unrealized (depreciation) appreciation included in earnings	20,181,757		4,373,111
Unsecured Debt
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value at beginning of period	5,956,280	4,823,898	4,823,898
Purchases of investments	117,066		62,086
Payment-in-kind interest	376,764		613,998
Sales and redemptions			(211,627)
Amortization of premium and accretion of discount, net	11,205		15,762
Fair value at end of period	6,543,287		5,956,280
Unsecured Debt | Operating Income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Change in unrealized (depreciation) appreciation included in earnings	81,468		651,997
Unsecured Debt | Foreign Currency
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Change in unrealized appreciation on foreign currency included in earnings	504		166
Equity Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value at beginning of period	71,757,583	$ 59,049,932	59,049,932
Purchases of investments	3,405,514		13,251,090
Sales and redemptions	(7,800,581)		(2,280,087)
Realized (losses) gains	259,536		(702,093)
Fair value at end of period	77,209,780		71,757,583
Equity Securities | Operating Income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Change in unrealized (depreciation) appreciation included in earnings	9,585,785		2,434,910
Equity Securities | Foreign Currency
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Change in unrealized appreciation on foreign currency included in earnings	$ 1,943		$ 3,831