Note J - Supplemental Cash Flow Information (Details) - Supplemental cash flow disclosures (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Oct. 31, 2013	Oct. 31, 2012
Supplemental disclosures:
Interest paid	$ 1,525	$ 1,323
Income taxes paid, net	5,108	8,530
Non-cash transactions:
Inventory acquired in repossession and payment protection plan claims	$ 21,765	$ 19,100