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Note G - Fair Value Measurements - Fair Value of Financial Instruments (Details) - USD ($)
$ in Thousands
Apr. 30, 2017
Apr. 30, 2016
Reported Value Measurement [Member]    
Cash $ 434 $ 602
Finance receivables, net 357,161 334,793
Accounts payable 11,224 12,313
Revolving credit facilities 117,944 107,902
Estimate of Fair Value Measurement [Member]    
Cash 434 602
Finance receivables, net 287,115 268,926
Accounts payable 11,224 12,313
Revolving credit facilities $ 117,944 $ 107,902