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Note C - Finance Receivables, Net (Details Textual) - USD ($)
 3 Months Ended 12 Months Ended
May 31, 2016
May 30, 2016
Oct. 31, 2016
Apr. 30, 2018
Apr. 30, 2017
Financing Receivable Interest Rate       16.30%  
Finance Receivables, Number of Loan Classes       1  
Finance Receivables, Number of Risk Pools       1  
Net Charge Offs as Percentage of Average Finance Receivables       28.80% 30.50%
Financing Receivable, Allowance for Credit Losses, Write-downs     $ 4,800,000    
Collections as Percentage of Average Financing Receivables       53.10% 53.60%
Delinquencies Greater Than 30 Days as Percentage of Average Financing Receivables       3.50% 3.60%
Minimum [Member]          
Financing Receivable Interest Rate       15.00%  
Financing Receivable Payment Period       1 year 180 days  
Maximum [Member]          
Financing Receivable Interest Rate 16.50% 15.00%   16.50%  
Financing Receivable Payment Period       3 years 180 days