SBA-GUARANTEED DEBENTURES - Schedule of SBA-guaranteed Debentures, Net of Prepaid Loan Fees (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
SBA Debentures, net of prepaid loan fees	$ 325,000,000	$ 313,600,000	$ 250,000,000	$ 176,500,000	$ 161,000,000	$ 150,000,000	$ 90,000,000	$ 65,000,000	$ 65,000,000	$ 16,250,000
SBA-guaranteed Debentures
Debt Instrument [Line Items]
SBA debentures payable	325,000,000	313,600,000
Deferred financing costs	(4,726,642)	(5,704,805)
SBA Debentures, net of prepaid loan fees	$ 320,273,358	$ 307,895,195