Note G - Fair Value Measurements - Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Jan. 31, 2020	Apr. 30, 2019
Reported Value Measurement [Member]
Cash	$ 2,083	$ 1,752
Finance receivables, net	467,255	415,486
Accounts payable	16,330	13,659
Debt facilities	184,300	152,918
Estimate of Fair Value Measurement [Member]
Cash	2,083	1,752
Finance receivables, net	373,635	334,147
Accounts payable	16,330	13,659
Debt facilities	$ 184,300	$ 152,918