Note C - Finance Receivables, Net - Financing Receivables Analysis (Details)	6 Months Ended
	Oct. 31, 2016	Oct. 31, 2015
Principal collected as a percent of average finance receivables	25.60%	27.70%
Average down-payment percentage	5.80%	6.50%
Average originating contract term (in months)	2 years 156 days	2 years 132 days