Note B - Summary of Significant Accounting Policies (Detail) (USD $)	3 Months Ended		12 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Apr. 30, 2012
Number of Reportable Segments	1
Concentration Risk, Percentage	41.00%
Finance Receivables Interest Rate Range Start	11.00%
Finance Receivable Interest Rate Range End	19.00%
Interest Earned On Financing Receivables (in Dollars)	$ 1,600,000		$ 1,400,000
Finance Receivables Repayment Terms	Customer payments are set to match their pay-day with over 80% of payments due on either a weekly or bi-weekly basis.
Finance Receivable Delinquency Determination	Accounts are delinquent when the customer is one day or more behind on their contractual payments.
Financing Receivable, Greater Than Or Equal To 30 Days Past Due, Percent Of Portfolio	4.00%	4.00%
Financing Receivable, Average Days Past Due At Charge Off	62
Financing Receivable, Allowance for Credit Losses, Policy for Uncollectible Amounts	The number of units repossessed or charged-off as a percentage of total units financed over specific historical periods of time. The average net repossession and charge-off loss per unit during the last eighteen months, segregated by the number of months since the contract origination date, and adjusted for the expected future average net charge-off loss per unit.About 50% of the charge-offs that will ultimately occur in the portfolio are expected to occur within 10-11 months following the balance sheet date.The average age of an account at charge-off date is 10.7 months. The timing of repossession and charge-off losses relative to the date of sale (i.e., how long it takes for a repossession or charge-off to occur) for repossessions and charge-offs occurring during the last eighteen months.
Service Contract Revenue Recognition Period	5 months
Late Fee Income Generated by Servicing Financial Assets, Amount (in Dollars)	461,000	394,000
(in Dollars)	638,000	361,000	656,000
Stock Repurchased During Period, Shares (in Shares)	215,846	388,520
Stock Repurchased During Period, Value (in Dollars)	$ 9,400,000	$ 11,100,000
Summary Of Significant Accounting Policies Note [Member]
Line of Credit Facility, Dividend Restrictions	The Company's revolving credit facilities generally limit distributions by the Company to its shareholders in order to repurchase the Company's common stock.The distribution limitations under the Agreement allow the Company to repurchase the Company's stock so long as: either (a) the aggregate amount of such repurchases does not exceed $40 million and the sum of borrowing bases combined minus the principal balances of all revolver loans after giving effect to such repurchases is equal to or greater than 25% of the sum of the borrowing bases, or (b) the aggregate amount of such repurchases does not exceed 75% of the consolidated net income of the Company measured on a trailing twelve month basis; provided that immediately before and after giving effect to the stock repurchases, at least 12.5% of the aggregate funds committed under the credit facilities remain available. Thus, the Company is limited in the amount of dividends or other distributions it can make to its shareholders without the consent of the Company's lenders.