Note C - Finance Receivables, Net (Details Textual) - USD ($)	6 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Apr. 30, 2020	Jul. 31, 2019	Apr. 30, 2019
Finance Receivables, Weighted Average Interest Rate	16.50%
Finance Receivables, Number of Loan Classes	1
Finance Receivables, Number of Risk Pools	1
Net Charge Offs as Percentage of Average Finance Receivables	9.60%	11.50%
Collections as Percentage of Average Financing Receivables	25.90%	26.80%
Delinquencies Greater Than 30 Days as Percentage of Average Financing Receivables	2.50%	3.50%
Finance Receivables, Allowance, Percent of Principle Balance	26.50%			24.50%	25.00%
Increase (Decrease) in Average Selling Price	$ 1,598
Increase (Decrease) in Average Selling Price, Percentage	13.90%
COVID-19 Pandemic [Member]
Finance Receivables, Allowance, Percent of Principle Balance			26.50%
Minimum [Member]
Financing Receivable Interest Rate	15.00%
Financing Receivable Payment Period (Month)	18 months
Minimum [Member] | ILLINOIS
Financing Receivable Interest Rate	19.50%
Maximum [Member]
Financing Receivable Interest Rate	16.50%
Financing Receivable Payment Period (Month)	48 months
Maximum [Member] | ILLINOIS
Financing Receivable Interest Rate	21.50%