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Note 7 - Stockholders' Equity (Details Textual) - $ / shares | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Common Stock, Shares Authorized (in shares) | 80,000,000 | 80,000,000
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ 0.001 | $ 0.001
Series B Preferred Stock [Member] |  |
Preferred Units, Authorized (in shares) | 65,000,000 |
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ 0.001 |
Convertible Preferred Stock, Shares Issued upon Conversion (in shares) | 10 |
Preferred Stock, Shares Outstanding (in shares) | 0 |

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