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Note 14 - Stock-based Compensation (Details Textual) - USD ($) $ in Millions |  |  |  | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 17, 2022 | Mar. 23, 2022 | Jan. 17, 2022 | Feb. 28, 2022 | Aug. 31, 2021 | Nov. 30, 2022 | Nov. 30, 2021 | Jun. 16, 2022 | Nov. 19, 2020
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares) | 50,000,000 |  |  |  |  |  |  | 300,000,000 |
Share-Based Payment Arrangement, Expense |  |  |  |  |  | $ 5.4 | $ 3.2 |  |
Percentage of RSUs Exchanged for Stock Options |  | 50.00% |  |  |  |  |  |  |
Number of RSUs Exchanged for Stock Options (in shares) |  | 778,750 |  |  |  | 3,874 | 8,392 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period (in shares) |  |  |  |  |  | 26,000 | 100,002 |  |
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount |  |  |  |  |  | $ 3.2 |  |  |
Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |  |  |
Share-Based Payment Arrangement, Expense |  |  |  |  |  | $ 2.6 | $ 2.9 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted (in shares) |  |  |  |  |  | 536,805 | 174,493 |  |
Share-Based Payment Arrangement, Plan Modification, Reclassified from Paid in Capital to Liability |  |  | $ 1.0 |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period (in shares) |  |  |  |  |  | 25,000 | 91,373 |  |
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount |  |  |  |  |  | $ 4.4 |  |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) |  |  |  |  |  | 2 years 1 month 6 days |  |  |
Restricted Stock Units (RSUs) [Member] | CTO [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted (in shares) |  |  |  | 200,000 |  |  |  |  |
Restricted Stock Units (RSUs) [Member] | Former Employee [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period (in shares) |  |  |  |  |  | 25,000 |  |  |
Modified Rewards [Member] |  |  |  |  |  |  |  |  |
Share-Based Payment Arrangement, Expense |  |  |  |  | $ 1.4 |  |  |  |
Share-Based Payment Arrangement, Option [Member] |  |  |  |  |  |  |  |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) |  |  |  |  |  | 2 years 3 months 18 days |  |  |
The 2017 Stock Option Plan (2017 Plan) [Member] |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares) |  |  |  |  |  |  | 1,899,327 |  |
The 2020 Equity Incentive Plan (2020 Plan) [Member] |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares) | 3,800,000 |  |  |  |  |  |  |  | 2,500,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized (in shares) | 1,300,000 |  |  |  |  |  |  |  |
The 2020 Equity Incentive Plan (2020 Plan) [Member] | Board of Directors Chairman [Member] |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures, Total (in shares) |  |  |  |  |  | 994,750 | 62,000 |  |
The 2020 Equity Incentive Plan (2020 Plan) [Member] | Share-Based Payment Arrangement, Option [Member] | Employees and Directors [Member] |  |  |  |  |  |  |  |  |
Share-Based Payment Arrangement, Expense |  |  |  |  |  | $ 2.8 | $ 0.3 |  |

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