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Note C - Finance Receivables, Net (Details Textual) - USD ($)
$ in Millions
 1 Months Ended 12 Months Ended
May 31, 2016
Apr. 30, 2017
Apr. 30, 2016
Financing Receivable Interest Rate   15.90%  
Finance Receivables, Number of Loan Classes   1  
Finance Receivables, Number of Risk Pools   1  
Net Charge Offs as Percentage of Average Finance Receivables   30.50% 31.30%
Increase in Provision for Credit Losses     $ 4.8
Collections as Percentage of Average Financing Receivables   53.60% 57.50%
Delinquencies Greater Than 30 Days as Percentage of Average Financing Receivables   3.60% 3.00%
Minimum [Member]      
Financing Receivable Interest Rate   15.00%  
Financing Receivable Payment Period   1 year 180 days  
Maximum [Member]      
Financing Receivable Interest Rate 16.50% 16.50% 15.00%
Financing Receivable Payment Period   3 years 180 days