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Note 15 - Stockholders' Equity (Details Textual) - USD ($) |  |  | 1 Months Ended | 3 Months Ended | 4 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 17, 2022 | Apr. 28, 2022 | May 31, 2022 | Mar. 31, 2022 | Feb. 28, 2022 | May 31, 2022 | May 31, 2022 | May 31, 2022 | Feb. 15, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares) |  |  | 300,000,000 |  |  | 300,000,000 | 300,000,000 | 300,000,000 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Limited (in shares) |  |  | 2,500,000 |  |  | 2,500,000 | 2,500,000 | 2,500,000 |
Treasury Stock, Value, Acquired, Cost Method |  |  | $ 4,999,993 | $ 7,346,422 | $ 2,653,571 | $ 12,346,000 | $ 14,999,986 | $ 15,000,000 |
Stock Buyback Plan [Member] |  |  |  |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  |  |  |  |  | $ 10,000,000
Treasury Stock, Value, Acquired, Cost Method |  |  | $ 5,000,000 | $ 10,000,000 |  |  |  |  |
Stock Repurchase Program, Authorized Amount, Addition |  | $ 5,000,000 |  |  |  |  |  |  |
Subsequent Event [Member] |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares) | 50,000,000 |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Limited, Increased (in shares) | 1,300,000 |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Limited (in shares) | 3,800,000 |  |  |  |  |  |  |  |

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