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Note 7 - Stockholders' Equity (Details Textual) - USD ($) | Jan. 12, 2024 | Jun. 30, 2025 | Dec. 31, 2024 | Jun. 30, 2024 | Dec. 31, 2023
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Deferred Compensation Arrangement with Individual, Shares Authorized for Issuance (in shares) |  | 3,708,663 | 3,393,017 | 3,184,683 | 3,098,917
Chief Executive Officer, and Other Employees [Member] |  |  |  |  |
Deferred Compensation Arrangement with Individual, Shares Authorized for Issuance (in shares) |  | 3,076,871 |  | 2,657,058 |
Non-Employees [Member] |  |  |  |  |
Common Stock, Capital Shares Reserved for Future Issuance (in shares) |  | 631,792 |  | 527,625 |
Over-Allotment Option [Member] |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | 372,110 |  |  |  |
Proceeds from Issuance of Common Stock | $ 192,156 |  |  |  |

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