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Note G - Fair Value Measurements - Fair Value of Financial Instruments (Details) - USD ($)
$ in Thousands
Jan. 31, 2018
Apr. 30, 2017
Reported Value Measurement [Member]    
Cash $ 534 $ 434
Finance receivables, net 380,384 357,161
Accounts payable 14,071 11,224
Revolving credit facilities and notes payable 148,172 117,944
Estimate of Fair Value Measurement [Member]    
Cash 534 434
Finance receivables, net 306,056 287,115
Accounts payable 14,071 11,224
Revolving credit facilities and notes payable $ 148,172 $ 117,944