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Note C - Finance Receivables, Net (Details Textual) - USD ($)
$ in Millions
 12 Months Ended
Apr. 30, 2016
Apr. 30, 2015
Maximum [Member]    
Financing Receivable Interest Rate 15.00%  
Financing Receivable Payment Period 3 years 180 days  
Minimum [Member]    
Financing Receivable Payment Period 1 year 180 days  
Finance Receivables, Number of Loan Classes 1  
Finance Receivables, Number of Risk Pools 1  
Net Charge Offs as Percentage of Average Finance Receivables 31.30% 27.80%
Increase in Provision for Credit Losses $ 4.8  
Collections as Percentage of Average Financing Receivables 57.50% 58.70%
Delinquecies Greater than 30 Days as Percentage of Average Finance Receivables 3.00% 5.80%