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Note 7 - Common Stock (Details Textual) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | May 24, 2022
Common Stock, Shares Authorized (in shares) | 47,000,000 | 47,000,000 |
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ 0.01 | $ 0.01 |
Dividends, Common Stock, Cash | $ 0 | $ 0 |
Treasury Stock, Value, Acquired, Cost Method | $ 181,000 |  |
The 2022 Stock Repurchase Program [Member] |  |  |
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in shares) |  |  | 500,000
Treasury Stock, Shares, Acquired (in shares) | 151,156 |  |
Treasury Stock, Value, Acquired, Cost Method | $ 187,427 |  |

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