INCOME TAXES - Reconciliation (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
INCOME TAXES
Net increase in net assets resulting from operations	$ 14,491,784	$ 33,572,872	$ 20,192,441
Net change in unrealized depreciation (appreciation)	17,536,190	6,928,160	(8,555,274)
Income tax provision	213,214	2,446,352	224,877
Loss on debt extinguishment		539,250
Pre-tax expense (income), loss (gain) reported at Taxable Subsidiaries, not consolidated for tax purposes	1,392,247	(16,619,608)	65,484
Long term capital loss carryover		(4,896,643)	4,896,643
Book income and tax income differences, including debt origination, interest accrual, income from pass-through investments, dividends, realized gains (losses) and changes in estimates	(3,615,815)	3,205,514	2,840,954
Estimated taxable income	30,017,620	25,175,897	19,665,125
Taxable income earned in prior year and carried forward for distribution in current year	24,011,459	21,051,549	22,434,805
Adjustment for cumulative effect of distributions carried forward			1,354,578
Taxable income earned prior to period end and carried forward	(28,606,043)	(25,182,518)	(21,051,549)
Distribution payable as of period end and paid in following period		1,171,059
Total distributions accrued or paid to common stockholders	$ 25,423,036	$ 22,215,987	$ 22,402,959