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Note 5 - Accrued Expenses (Tables) | 9 Months Ended
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Aug. 31, 2013
Payables and Accruals [Abstract] |
Schedule of Accrued Liabilities [Table Text Block] |
|  | August 31, 2013 |  |  | November 30, 2012 |
Salaries, wages, and commissions |  | $ | 914,803 |  |  | $ | 924,123 |
Accrued warranty expense |  |  | 520,428 |  |  |  | 578,864 |
Other |  |  | 346,429 |  |  |  | 457,253 |
|  | $ | 1,781,660 |  |  | $ | 1,960,240 |

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- Definition Tabular disclosure of the components of accrued liabilities. + References No definition available. + Details
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