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Note 13 - Stockholders' Equity (Details Textual) - USD ($) |  |  |  |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 06, 2022 | Jun. 17, 2022 | Apr. 28, 2022 | Apr. 09, 2021 | Nov. 30, 2022 | Oct. 31, 2022 | May 31, 2022 | Mar. 31, 2022 | Feb. 28, 2022 | Jul. 31, 2021 | Nov. 30, 2022 | Nov. 30, 2021 | Jun. 16, 2022 | Feb. 15, 2022
Stock Issued During Period, Shares, New Issues (in shares) |  |  |  |  |  |  |  |  |  | 2,875,000 |  |  |  |
Shares Issued, Price Per Share (in dollars per share) |  |  |  |  |  |  |  |  |  | $ 21.00 |  |  |  |
Stock Offering, Underwriting Discounts, Commissions, and Offering Expenses |  |  |  |  |  |  |  |  |  | $ 4,400,000 |  |  |  |
Proceeds from Issuance of Common Stock, Net |  |  |  |  |  |  |  |  |  | $ 56,000,000.0 | $ 0 | $ 55,952,000 |  |
Preferred Stock, Par or Stated Value Per Share (in dollars per share) |  |  |  |  | $ 0.001 |  |  |  |  |  | $ 0.001 | $ 0.001 |  |
Dividends Payable |  |  |  |  | $ (0) |  |  |  |  |  | $ (0) | $ 1,043,000 |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares) |  | 50,000,000 |  |  |  |  |  |  |  |  |  |  | 300,000,000 |
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 |  |  |  |  |  |  |  |  |  |  | 2,500,000 |
Treasury Stock, Value, Acquired, Cost Method |  |  |  |  | 434,920 | $ 2,065,076 | $ 4,999,993 | $ 7,346,422 | $ 2,653,571 |  | $ 17,499,982 |  |  |
Stock Buyback Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 10,000,000.0
Treasury Stock, Value, Acquired, Cost Method |  |  |  |  | $ 2,500,000 |  | $ 5,000,000.0 | $ 10,000,000.0 |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount, Addition | $ 2,500,000 |  | $ 5,000,000.0 |  |  |  |  |  |  |  |  |  |  |
Series A Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends Payable, Amount Per Share (in dollars per share) |  |  |  | $ 750 |  |  |  |  |  |  |  |  |  |
Preferred Stock, Par or Stated Value Per Share (in dollars per share) |  |  |  | $ 0.001 |  |  |  |  |  |  |  |  |  |
Dividends Payable |  |  |  | $ 1,000,000.0 |  |  |  |  |  |  |  |  |  |
Conversion of Stock, Shares Converted (in shares) |  |  |  | 4,636,649 |  |  |  |  |  |  |  |  |  |
Conversion of Stock, Shares Issued (in shares) |  |  |  | 695,498 |  |  |  |  |  |  |  |  |  |
Over-Allotment Option [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) |  |  |  |  |  |  |  |  |  | 375,000 |  |  |  |

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