Note M - Supplemental Cash Flow Information - Supplemental Cash Flow Disclosures (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2018
Interest paid	$ 8,152	$ 7,259	$ 5,599
Income taxes paid, net	8,505	11,022	11,092
Non-cash transactions:
Inventory acquired in repossession and payment protection plan claims	51,450	51,514	42,274
Purchase of property and equipment using the issuance of debt			1,151
Loss accrued on disposal of property and equipment	3	29
Net settlement option exercises	$ 1,589	$ 2,848	$ 3,859