FINANCE RECEIVABLES AND ALLOWANCE FOR CREDIT LOSSES (Roll Forward of the Allowance for Credit Losses on Our Gross Loans Receivable) (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Mar. 31, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 97,852,630	$ 112,686,597	$ 91,722,288	$ 96,487,856
Provision for credit losses	42,043,526	26,090,367	72,309,337	51,751,027
Charge-offs	(29,849,610)	(33,793,503)	(59,866,550)	(77,625,445)
Recoveries	4,613,694	4,617,898	10,495,165	10,359,553
Net charge-offs	(25,235,916)	(29,175,605)	(49,371,385)	(67,265,892)
Ending Balance	$ 114,660,240	$ 109,601,359	$ 114,660,240	109,601,359	$ 96,487,856
Accounting Standards Update [Extensible List]					Accounting Standards Update 2016-13
Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				$ 28,628,368
Ending Balance					$ 28,628,368