FINANCE RECEIVABLES AND ALLOWANCE FOR CREDIT LOSSES (Financing Receivables) (Details) - USD ($)	Dec. 31, 2020	Sep. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Mar. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans in bankruptcy, excluding contractually delinquent			$ 5,165,752	$ 5,066,019
Gross loans contractually delinquent			70,719,727	80,765,569
Loans not contractually delinquent and not in bankruptcy			1,133,985,887	1,286,936,992
Gross loans receivable	$ 1,264,530,315		1,209,871,366	1,372,768,580
Unearned interest and fees			(308,980,724)	(366,034,067)
Net loans			900,890,642	1,006,734,513
Allowance for credit losses	(113,467,361)	$ (109,601,359)	(96,487,856)	(113,069,641)	$ (101,469,313)	$ (81,519,624)
Loans receivable, net	$ 816,007,035		804,402,786	893,664,872
Loans individually evaluated for impairment (impaired loans)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans in bankruptcy, excluding contractually delinquent			5,165,752	5,066,019
Gross loans contractually delinquent			70,719,727	80,765,569
Loans not contractually delinquent and not in bankruptcy			0	0
Gross loans receivable			75,885,479	85,831,588
Unearned interest and fees			(16,848,762)	(19,140,361)
Net loans			59,036,717	66,691,227
Allowance for credit losses			(54,090,509)	(61,840,514)
Loans receivable, net			4,946,208	4,850,713
Loans collectively evaluated for impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans in bankruptcy, excluding contractually delinquent			0	0
Gross loans contractually delinquent			0	0
Loans not contractually delinquent and not in bankruptcy			1,133,985,887	1,286,936,992
Gross loans receivable			1,133,985,887	1,286,936,992
Unearned interest and fees			(292,131,962)	(346,893,706)
Net loans			841,853,925	940,043,286
Allowance for credit losses			(42,397,347)	(51,229,127)
Loans receivable, net			$ 799,456,578	$ 888,814,159