Note C - Finance Receivables, Net - Financing Receivables Analysis (Details)	3 Months Ended
	Jul. 31, 2019	Jul. 31, 2018
Principal collected as a percent of average finance receivables	13.50%	13.10%
Average down-payment percentage	6.50%	6.10%
Average originating contract term (in months) (Month)	2 years 177 days	2 years 171 days