Note C - Finance Receivables, Net - Financing Receivables Analysis (Details)	12 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
Principal collected as a percent of average finance receivables	55.10%	55.30%
Average down-payment percentage	6.40%	6.50%
Average originating contract term (in months) (Month)	2 years 201 days	2 years 165 days
Portfolio weighted average contract term, including modifications (in months) (Month)	2 years 279 days	2 years 243 days