PORTFOLIO INVESTMENTS AND FAIR VALUE - Aggregate Values of Level 3 Portfolio Investments Change (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value at beginning of period	$ 874,460,683	$ 844,733,638
Purchases of investments	221,154,933	187,469,608
PIK interest	3,310,111	3,799,843
Sales and redemptions	(151,692,285)	(137,816,595)
Realized (losses) gains	$ (15,843,406)	$ (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)
Change in unrealized (depreciation) appreciation included in earnings	$ 19,570,409	$ 2,792,152
Change in unrealized appreciation on foreign currency included in earnings	(178,559)	614,520
Amortization of premium and accretion of discount, net	2,715,802	2,749,543	$ 2,519,462
Fair value at end of period	953,497,688	874,460,683	844,733,638
Level 3 transfers	0	0
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
Purchases of investments	213,545,132	174,156,432
PIK interest	2,824,403	3,185,845
Sales and redemptions	(126,924,841)	(125,442,776)
Realized (losses) gains	(1,580,768)	(11,200,184)
Change in unrealized (depreciation) appreciation included in earnings	(9,026,597)	(4,667,866)
Change in unrealized appreciation on foreign currency included in earnings	(169,778)	610,523
Amortization of premium and accretion of discount, net	2,639,384	2,591,838
Fair value at end of period	856,096,255	774,789,320	735,555,508
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
Sales and redemptions	(9,782,348)	(9,882,105)
Realized (losses) gains	(20,475,000)	(17,979,749)
Change in unrealized (depreciation) appreciation included in earnings	20,187,185	4,373,111
Amortization of premium and accretion of discount, net	61,513	141,943
Fair value at end of period	11,948,850	21,957,500	45,304,300
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
Purchases of investments	117,066	62,086
PIK interest	485,708	613,998
Sales and redemptions		(211,627)
Change in unrealized (depreciation) appreciation included in earnings	40,312	651,997
Change in unrealized appreciation on foreign currency included in earnings	(1,778)	166
Amortization of premium and accretion of discount, net	14,905	15,762
Fair value at end of period	6,612,493	5,956,280	4,823,898
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
Purchases of investments	7,492,735	13,251,090
Sales and redemptions	(14,985,096)	(2,280,087)
Realized (losses) gains	6,212,362	(702,093)
Change in unrealized (depreciation) appreciation included in earnings	8,369,509	2,434,910
Change in unrealized appreciation on foreign currency included in earnings	(7,003)	3,831
Fair value at end of period	$ 78,840,090	$ 71,757,583	$ 59,049,932