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Note E - Accrued Liabilities (Tables) | 9 Months Ended
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Jan. 31, 2013
Schedule of Accrued Liabilities [Table Text Block] |
(In thousands) |  | January 31, 2013 |  |  | April 30, 2012 |
Compensation |  | $ | 4,517 |  |  | $ | 5,063 |
Cash overdrafts (see Note B) |  |  | 3,145 |  |  |  | 128 |
Deferred service contract revenue (see Note B) |  |  | 3,347 |  |  |  | 3,036 |
Deferred sales tax (see Note B) |  |  | 2,332 |  |  |  | 1,785 |
Interest |  |  | 260 |  |  |  | 185 |
Other |  |  | 2,841 |  |  |  | 3,152 |
|  | $ | 16,442 |  |  | $ | 13,349 |

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- Definition Tabular disclosure of the components of accrued liabilities. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration