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Note 9 - Intangible Assets (Tables) | 12 Months Ended
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Nov. 30, 2022
Notes Tables |
Schedule of Intangible Assets and Goodwill [Table Text Block] |
|  |  |  |  |  | As of November 30, 2022 |  |  | As of November 30, 2021 |
|  | 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 |  |  | $ | (468 | ) |  | $ | 3,463 |  |  | $ | 3,895 |  |  | $ | (227 | ) |  | $ | 3,668 |
Trademarks |  | Indefinite |  |  |  | 360 |  |  |  | — |  |  |  | 360 |  |  |  | — |  |  |  | — |  |  |  | — |
Customer List |  |  | 2 |  |  |  | 70 |  |  |  | (21 | ) |  |  | 49 |  |  |  | — |  |  |  | — |  |  |  | — |
Total |  |  |  |  |  | $ | 4,361 |  |  | $ | (489 | ) |  | $ | 3,872 |  |  | $ | 3,895 |  |  | $ | (227 | ) |  | $ | 3,668 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
Fiscal Year Ending November 30, |  |  |  |
2023 |  | $ | 289 |
2024 |  |  | 267 |
2025 |  |  | 254 |
2026 |  |  | 254 |
2027 |  |  | 254 |
Thereafter |  |  | 2,194 |
Total |  | $ | 3,512 |

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