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Note 11 - Intangible Assets (Tables) | 9 Months Ended
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Aug. 31, 2022
Notes Tables |
Schedule of Intangible Assets and Goodwill [Table Text Block] |
|  | Balance at August 31, 2022 |  |  | Balance at November 30, 2021 |
|  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Carrying Amount |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Carrying Amount |
Patents |  | $ | 3,938 |  |  | $ | (405 | ) |  | $ | 3,533 |  |  | $ | 3,895 |  |  | $ | (227 | ) |  | $ | 3,668 |
Trademarks |  |  | 360 |  |  |  | — |  |  |  | 360 |  |  |  | — |  |  |  | — |  |  |  | — |
Customer List |  |  | 70 |  |  |  | (11 | ) |  |  | 59 |  |  |  | — |  |  |  | — |  |  |  | — |
Total |  | $ | 4,368 |  |  | $ | (416 | ) |  | $ | 3,952 |  |  | $ | 3,895 |  |  | $ | (227 | ) |  | $ | 3,668 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
Fiscal Year Ending November 30, |  |  |  |
2022 (three months) |  | $ | 68 |
2023 |  |  | 272 |
2024 |  |  | 252 |
2025 |  |  | 237 |
2026 |  |  | 237 |
Thereafter |  |  | 2,344 |
Total |  | $ | 3,410 |

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