Note G - Fair Value Measurements - Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Apr. 30, 2019	Apr. 30, 2018
Reported Value Measurement [Member]
Cash	$ 1,752	$ 1,022
Finance receivables, net	415,486	383,617
Accounts payable	13,659	13,609
Debt facilities	152,918	152,367
Estimate of Fair Value Measurement [Member]
Cash	1,752	1,022
Finance receivables, net	334,147	308,384
Accounts payable	13,659	13,609
Debt facilities	$ 152,918	$ 152,367