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Note G - Fair Value Measurements - Fair Value of Financial Instruments (Details) - USD ($)
$ in Thousands
Oct. 31, 2018
Apr. 30, 2018
Reported Value Measurement [Member]    
Cash $ 679 $ 1,022
Finance receivables, net 409,714 383,617
Accounts payable 13,467 13,609
Debt facilities 164,789 152,367
Estimate of Fair Value Measurement [Member]    
Cash 679 1,022
Finance receivables, net 329,543 308,384
Accounts payable 13,467 13,609
Debt facilities $ 164,789 $ 152,367