Note C - Finance Receivables, Net - Financing Receivables Analysis (Details)	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020
Principal collected as a percent of average finance receivables	53.20%	55.10%
Average down-payment percentage	7.10%	6.40%
Average originating contract term (in months) (Month)	34 months 18 days	30 months 21 days
Portfolio weighted average contract term, including modifications (in months) (Month)	37 months 9 days	33 months 9 days