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Note 12 - Shareholders' Equity (Details Textual) - USD ($) |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Jul. 21, 2025 | Jun. 25, 2024 | Dec. 31, 2025 | Dec. 31, 2024 | Aug. 12, 2025
Proceeds from Issuance of Common Stock |  |  | $ 43,282,000 | $ 11,747,000 |
Stock Issued During Period, Shares Settlement of Deferred Stock Units (in shares) |  |  | 142,345 |  |
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures (in shares) |  |  | 35,215 | 23,660 |
Proceeds from Stock Options Exercised |  |  | $ 1,004,000 | $ 256,000 |
Share-Based Payment Arrangement, Option [Member] |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares) |  |  | 415,253 | 117,000 |
Private Placement [Member] |  |  |  |  |
Stock Issued During Period, Shares, New Issues | 8,606,425 | 4,720,000 |  |  |
Shares Issued, Price Per Share | $ 3.5 | $ 2.5 |  |  |
Proceeds from Issuance of Common Stock | $ 30,100,000 | $ 11,800,000 |  |  |
Proceeds from Issuance of Common Stock, Net | $ 30,000,000 | $ 11,700,000 |  |  |
Liquidated Damage, Percentage of Invested Capital, Maximum | 10.00% | 10.00% |  |  |
A T M Offering [Member] |  |  |  |  |
Stock Issued During Period, Shares, New Issues |  |  | 1,724,472 |  |
Proceeds from Issuance of Common Stock |  |  | $ 13,800,000 |  |
Equity Issuance, Maximum Aggregate Offering Price |  |  |  |  | $ 100,000,000
Equity Issuance, Remaining Available Offering Price |  |  | $ 86,200,000 |  |

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