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Note B - Summary of Significant Accounting Policies (Details Textual) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 31, 2015 | Apr. 30, 2016 | Apr. 30, 2015 | Apr. 30, 2014
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | Arkansas, USA [Member] |  |  |  |
Concentration Risk, Percentage |  | 31.00% |  |
Maximum [Member] |  |  |  |
Financing Receivable Interest Rate |  | 15.00% |  |
Allowance for Credit Losses, Primary Factor Units Repossessed or Charged Off Evaluation Period |  | 5 years |  |
Minimum [Member] |  |  |  |
Allowance for Credit Losses, Primary Factor Units Repossessed or Charged Off Evaluation Period |  | 1 year |  |
2006 Employee Stock Purchase Plan [Member] |  |  |  |
Common Stock Discount on Shares Percentage |  | 15.00% |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized |  | 200,000 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant |  | 152,636 |  |
Payment Protection Plan Liability, Anticipated Losses in Excess of Deferred Revenues |  | $ 0 | $ 0 |
Goodwill, Impairment Loss |  | 0 | 0 |
Income Tax Examination, Penalties and Interest Accrued |  | $ 0 | 0 |
Number of Reportable Segments |  | 1 |  |
Line of Credit Facility,Distribution Limitations Maximum Aggregate Amount of Stock Repurchases |  | $ 40,000,000 |  |
Line of Credit Facility, Distribution Limitations Percentage of Sum of Borrowing Bases |  | 30.00% |  |
Line of Credit Facility, Distribution Limitations Percentage of Consolidated Net Income |  | 75.00% |  |
Line of Credit Facility Distribution Limitations Minimum Percentage of Aggregate Funds Available |  | 12.50% |  |
Interest Earned on Financing Receivables |  | $ 1,700,000 | $ 2,000,000 |
Finance Receivables, Customer Payments Due Either Weekly or Bi-Weekly, Percentage |  | 73.00% |  |
Financing Receivable, Greater Than or Equal to 30 Days Past Due, Percent of Portfolio |  | 3.00% | 5.80% |
Financing Receivable, Average Days Past Due At Charge Off |  | 62 days |  |
Percentage of Receivable Charge-Offs |  | 50.00% |  |
Average Age of Account at Charge-Off Date |  | 11 years 255 days |  |
Financing Receivable, Allowance for Credit Losses, Write-downs | $ 4,800,000 |  |  |
Financing Receivable, Recorded Investment Greater Than 90 Days Past Due |  | $ 1,089,000 | $ 2,795,000 |
Late Fee Income Generated by Servicing Financial Assets, Amount |  | 2,000,000 | 2,200,000 | $ 2,200,000
Advertising Expense |  | $ 4,200,000 | 3,600,000 | 4,200,000
Defined Contribution Plan, Employer Matching Contribution, Percent of Match |  | 50.00% |  |
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay |  | 4.00% |  |
Defined Contribution Plan, Employer Discretionary Contribution Amount |  | $ 403,000 | $ 363,000 | $ 329,000
Stock Repurchased During Period, Shares |  | 493,073 | 442,700 | 325,598
Stock Repurchased During Period, Value |  | $ 14,200,000 | $ 20,000,000 | $ 12,800,000
Treasury Stock, Shares to Establish Reserve Account to Secure Service Contracts |  | 10,000 |  |

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- Definition All amounts that are due to the servicer of a financial asset as a result of the debt holder not meeting the monthly payment terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=68078379&loc=d3e122596-111746 + Details
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