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Note 9 - Related Party Transactions (Details Textual) - USD ($) $ / shares in Units, $ in Millions | Jul. 03, 2024 | Sep. 30, 2025 | Dec. 31, 2024 | Mar. 28, 2024
--- | --- | --- | --- | ---
Common Stock, Par or Stated Value Per Share (in dollars per share) |  | $ 0.001 | $ 0.001 |
Warrants Issued in 2024 Rights Offering [Member] |  |  |  |
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) | 0.5 |  |  | 0.5
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | 5,999,999 | 205,953 |  |
Warrants Issued in 2024 Rights Offering [Member] | Maximum [Member] |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | 6,000,000 |  |  |
The 2024 Right Offering [Member] |  |  |  |
Equity Offering, Units, Maximum Amount Authorized (in shares) | 6,000,000 |  |  | 6,000,000
Shares Issued, Price Per Share (in dollars per share) | $ 10 |  |  | $ 10
Number of Shares Per Unit Issued (in shares) | 1 |  |  | 1
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ 0.001 |  |  | $ 0.001
Number of Warrants in Each Unit (in shares) | 2 |  |  | 2
Stock Issued During Period, Shares, New Issues (in shares) | 5,999,998 |  |  |
Proceeds from Issuance or Sale of Equity | $ 60 |  |  |
The 2024 Right Offering [Member] | Majority Stockholder and Co-chairman [Member] |  |  |  |
Percent of Offering Purchased | 88.00% |  |  |

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