SBA-GUARANTEED DEBENTURES - Schedule of interest expense and amortized fees on the SBA-guaranteed debentures (Details) - SBA-guaranteed Debentures - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Debt Instrument [Line Items]
Interest expense	$ 2,076,751	$ 1,661,946	$ 5,743,011	$ 4,644,014
Debenture fee amortization	316,274	299,373	905,294	801,258
Total interest and financing expenses	$ 2,393,025	$ 1,961,319	$ 6,648,305	$ 5,445,272
Weighted average interest rate	2.80%	2.70%	2.70%	2.80%
Effective interest rate (including fee amortization)	3.20%	3.20%	3.20%	3.30%
Average debt outstanding	$ 299,556,522	$ 246,173,913	$ 280,681,996	$ 220,354,579
Cash paid for interest	$ 3,955,224	$ 3,201,057	$ 7,360,295	$ 5,907,676