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Note J - Supplemental Cash Flow Information (Tables) | 3 Months Ended
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Jul. 31, 2013
Supplemental Cash Flow Elements [Abstract] |
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] |
|  | Three Months Ended July 31, |
(in thousands) |  | 2013 |  |  | 2012 |
Supplemental disclosures: |  |  |  |  |  |
Interest paid |  | $ | 801 |  |  | $ | 665 |
Income taxes paid, net |  |  | 378 |  |  |  | 1,286 |
Non-cash transactions: |  |  |  |  |  |  |  |
Inventory acquired in repossession and payment protection plan claims |  |  | 10,382 |  |  |  | 9,200 |

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- Definition Tabular disclosure of supplemental cash flow information for the periods presented. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_SupplementalCashFlowElementsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration