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Note 17 - Related Party Transactions (Details Textual) - USD ($) $ in Thousands | 7 Months Ended | 12 Months Ended | 24 Months Ended
--- | --- | --- | ---
Jun. 30, 2020 | Nov. 30, 2021 | Nov. 30, 2020 | Nov. 30, 2018 | Nov. 30, 2021
Related Party Transaction, Amounts of Transaction |  | $ 0 | $ 0 |  |
Share-based Payment Arrangement, Expense |  | 3,200 | 1,300 |  |
Stock Issued During Period, Value, Purchase of Assets |  |  | 693 |  |
Chief Executive Officer [Member] |  |  |  |  |
Related Party Transaction, Amounts of Transaction |  | 10 | 20 |  |
Related Party Transaction, Monthly Amounts of Transaction | $ 2 |  |  |  |
Andre Buys [Member] |  |  |  |  |
Related Party Transaction, Amounts of Transaction |  | 400 |  |  | $ 200
Due to Related Parties, Total |  | 100 | 200 |  | $ 100
Share-based Payment Arrangement, Expense |  | $ 10 | $ 20 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures, Total (in shares) |  |  |  | 150,000 |
Andre Buys [Member] | Patents [Member] |  |  |  |  |
Stock Issued During Period, Shares, Purchase of Assets (in shares) |  | 386,681 |  |  |
Stock Issued During Period, Value, Purchase of Assets |  | $ 700 |  |  |

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