Note K - Supplemental Cash Flow Information - Supplemental Cash Flow Disclosures (Details) - USD ($) $ in Thousands	9 Months Ended
	Jan. 31, 2017	Jan. 31, 2016
Supplemental disclosures:
Interest paid	$ 3,040	$ 2,614
Income taxes paid, net	4,726	5,650
Non-cash transactions:
Inventory acquired in repossession and payment protection plan claims	30,610	31,594
Loss accrued (incurred) on disposal of property and equipment	(300)
Purchase of property and equipment using the issuance of debt		$ 550