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Note 1 - Summary of Significant Accounting Policies (Details Textual) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2025 $ / shares shares | Sep. 30, 2024 $ / shares shares | Sep. 30, 2025 $ / shares shares | Sep. 30, 2024 $ / shares shares | Dec. 31, 2024
Number Of Subsidiaries |  |  | 2 |  | 2
Weighted Average Number of Shares Outstanding, Diluted, Adjustment (in shares) | 12,242 | 0 | 1,532 | 0 |
Number of Reportable Segments |  |  | 1 |  |
Share-Based Payment Arrangement, Option [Member] |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | 508,619 | 523,619 | 508,619 | 523,619 |
Antidilutive Securities Excluded From Computation of Earnings Per Share, Exercise Price (in dollars per share) | $ / shares | $ 10.45 | $ 10.45 | $ 10.45 | $ 10.45 |
Non-vested Stock [Member] |  |  |  |  |
Weighted Average Number of Shares Outstanding, Diluted, Adjustment (in shares) | 12,242 |  | 1,532 |  |

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