Note C - Financing Receivables Analysis (Details)	3 Months Ended
	Jul. 31, 2015	Jul. 31, 2014
Principal collected as a percent of average finance receivables	14.00%	14.10%
Average down-payment percentage	6.60%	6.90%
Average originating contract term (in months)	2 years 126 days	2 years 96 days