Note B - Summary of Significant Accounting Policies - Sales (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2020
Sales	$ 1,060,512	$ 808,065	$ 652,992
Sales Used Autos [Member]
Sales	927,043	713,925	567,816
Wholesales Third Party [Member]
Sales	51,641	34,286	28,966
Service Contract Sales [Member]
Sales	49,154	33,028	31,480
Payment Protection Plan Revenue [Member]
Sales	$ 32,674	$ 26,826	$ 24,730