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Fair Value (Details) - USD ($)	12 Months Ended
Fair Value (Details) - USD ($)	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Average loan life	8 months
Cash and cash equivalents	$ 9,335,433	$ 12,473,833	$ 11,581,936	$ 8,095,263
Loans and Leases Receivable, Net Amount	755,624,007	679,153,528
Book value of debt [Abstract]
Senior notes payable	251,940,000	244,900,000
Total long-term debt	251,940,000
Book value [Member] \| Senior notes payable [Member]
Book value of debt [Abstract]
Senior notes payable	251,940,000	244,900,000
Estimate of Fair Value Measurement [Member] \| Senior notes payable [Member]
Book value of debt [Abstract]
Senior notes payable	251,940,000	244,900,000
Fair Value, Inputs, Level 1 [Member] \| Book value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	9,335,433	12,473,833
Fair Value, Inputs, Level 1 [Member] \| Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	9,335,433	12,473,833
Fair Value, Inputs, Level 3 [Member] \| Book value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Receivables, Fair Value Disclosure	755,624,007	679,153,528
Fair Value, Inputs, Level 3 [Member] \| Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Receivables, Fair Value Disclosure	$ 755,624,007	$ 679,153,528