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Note 15 - Stock-based Compensation (Details Textual) - USD ($) $ / shares in Units, $ in Millions |  | 3 Months Ended | 6 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Aug. 31, 2024 | Aug. 31, 2024 | Aug. 31, 2023 | May 31, 2024 | Aug. 31, 2024 | Aug. 31, 2023 | Jun. 17, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares) |  |  |  |  | 274,084 |  |
Restricted Stock Units (RSUs), Excluding Time-based Units [Member] |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted (in shares) |  |  |  |  | 600,000 |  |
Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |
Share-Based Payment Arrangement, Expense |  | $ 0.4 | $ 1.3 |  | $ 1.2 | $ 3.4 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted (in shares) |  |  |  |  | 709,706 |  |
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount | $ 2.3 | $ 2.3 |  |  | $ 2.3 |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) |  |  |  |  | 1 year 8 months 12 days |  |
Stock Issued During Period, Shares, Restricted Stock Award, Gross (in shares) |  |  |  |  | 658,281 |  |
Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation (in shares) |  |  |  |  | 47,035 |  |
Stock Repurchased During Period, Shares (in shares) |  |  |  |  | 21,905 |  |
Stock Repurchased During Period, Value |  |  |  |  | $ 0.3 |  |
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures (in shares) |  |  |  | 589,341 |  |  |
Restricted Stock Units (RSUs) [Member] | Share-Based Payment Arrangement, Tranche One [Member] |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage | 33.33% |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, 20 Day Volume Weighted Average Closing Price (in dollars per share) | $ 6 | $ 6 |  |  | $ 6 |  |
Restricted Stock Units (RSUs) [Member] | Share-Based Payment Arrangement, Tranche Two [Member] |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage | 33.33% |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, 20 Day Volume Weighted Average Closing Price (in dollars per share) | $ 9 | 9 |  |  | 9 |  |
Restricted Stock Units (RSUs) [Member] | Share-Based Payment Arrangement, Tranche Three [Member] |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage | 33.33% |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, 20 Day Volume Weighted Average Closing Price (in dollars per share) | $ 12 | $ 12 |  |  | $ 12 |  |
Restricted Stock Units (RSUs), Time-based [Member] |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  |  |  |  | 109,706 | 9,805 |
Share-Based Payment Arrangement, Option [Member] |  |  |  |  |  |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) | 1 year 4 months 24 days |  |  |  |  |  |
Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation (in shares) |  |  |  |  | 54,017 |  |
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount | $ 1.8 | $ 1.8 |  |  | $ 1.8 |  |
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
Share-Based Payment Arrangement, Expense |  | 0.8 | 1.7 |  | 2.6 | $ 4.7 |
The 2020 Equity Incentive Plan (2020 Plan) [Member] | Share-Based Payment Arrangement, Option [Member] | Employees and Directors [Member] |  |  |  |  |  |  |
Share-Based Payment Arrangement, Expense |  | $ 0.4 | $ 0.4 |  | $ 1.4 | $ 1.3 |

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