Finance Receivables (Detail Textuals 1) - USD ($)		6 Months Ended
	Feb. 28, 2019	Sep. 30, 2020	Sep. 30, 2019
Accounts Notes And Loans Receivable [Line Items]
Maximum criteria for receivable to be a performing account		61 days
Percentage of more than payment contractually for delinquent		25.00%
Minimum criteria for receivable to be a non-performing account		61 days
Troubled debt restructuring allowance for credit losses		$ 86,000	$ 232,000
Minimum
Accounts Notes And Loans Receivable [Line Items]
Criteria for receivable to be delinquent account	121 days