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Note 11 - Intangible Assets (Tables) | 3 Months Ended
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Feb. 28, 2023
Notes Tables |
Schedule of Intangible Assets and Goodwill [Table Text Block] |
|  |  |  |  |  | Balance at February 28, 2023 |  |  | Balance at November 30, 2022 |
|  | Estimated Useful Lives in Years |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Carrying Amount |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Carrying Amount |
Patents |  | 10 | - | 17 |  |  | $ | 3,931 |  |  | $ | (532 | ) |  | $ | 3,399 |  |  | $ | 3,931 |  |  | $ | (468 | ) |  | $ | 3,463 |
Trademarks |  | Indefinite |  |  |  | 360 |  |  |  | — |  |  |  | 360 |  |  |  | 360 |  |  |  | — |  |  |  | 360 |
Customer List |  | 2 |  |  |  | 70 |  |  |  | (29 | ) |  |  | 41 |  |  |  | 70 |  |  |  | (21 | ) |  |  | 49 |
Total |  |  |  |  |  | $ | 4,361 |  |  | $ | (561 | ) |  | $ | 3,800 |  |  | $ | 4,361 |  |  | $ | (489 | ) |  | $ | 3,872 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
Fiscal Year Ending November 30, |  |  |  |
2023 (nine months) |  | $ | 217 |
2024 |  |  | 272 |
2025 |  |  | 254 |
2026 |  |  | 254 |
2027 |  |  | 254 |
Thereafter |  |  | 2,189 |
Total |  | $ | 3,440 |

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