Note C - Finance Receivables, Net - Financing Receivables Analysis (Details)	9 Months Ended
	Jan. 31, 2019	Jan. 31, 2018
Principal collected as a percent of average finance receivables	39.20%	37.20%
Average down-payment percentage	5.80%	5.80%
Average originating contract term (Month)	2 years 162 days	2 years 165 days