Note B - Summary of Significant Accounting Policies - Sales (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Oct. 31, 2022	Jul. 31, 2022	Oct. 31, 2021	Oct. 31, 2022	Oct. 31, 2021
Sales	$ 303,554	$ 294,476	$ 247,520	$ 598,031	$ 491,423
Sales Used Autos [Member]
Sales	263,743		218,326	522,795	433,335
Wholesales Third Party [Member]
Sales	17,223		11,441	31,042	23,736
Service Contract Sales [Member]
Sales	14,002		10,104	27,188	19,381
Payment Protection Plan Revenue [Member]
Sales	$ 8,586		$ 7,649	$ 17,006	$ 14,971