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Note 7 - Accrued Expenses (Tables) | 12 Months Ended
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Nov. 30, 2012
Schedule of Accrued Liabilities [Table Text Block] |
|  | November 30, 2012 |  |  | November 30, 2011 |
Salaries, wages, and commissions |  | $ | 924,123 |  |  | $ | 672,407 |
Accrued warranty expense |  |  | 578,864 |  |  |  | 201,630 |
Other |  |  | 457,253 |  |  |  | 489,239 |
|  | $ | 1,960,240 |  |  | $ | 1,363,276 |

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