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Note 8 - Accrued Expenses (Tables) | 12 Months Ended
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Nov. 30, 2017
Notes Tables |
Schedule of Accrued Liabilities [Table Text Block] |
|  | November 30, 2017 |  |  | November 30, 2016 |
Salaries, wages, and commissions |  | $ | 584,768 |  |  | $ | 542,449 |
Accrued warranty expense |  |  | 68,451 |  |  |  | 134,373 |
Other |  |  | 328,339 |  |  |  | 342,234 |
|  | $ | 981,558 |  |  | $ | 1,019,056 |

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