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v3.26.1

Stockholders' equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jan. 12, 2026 | Mar. 31, 2026 | Mar. 31, 2025 | Dec. 31, 2025
Common Stock Warrants |  |  |  |
Warrants exercisable |  | 102,718 |  | 102,718
Warrant exercise price |  | $ 12.66 |  | $ 12.66
At-the-Market ("ATM") Offering |  |  |  |
Issuance of common stock |  | $ (43) | $ 9,198 |
Market Offering |  |  |  |
At-the-Market ("ATM") Offering |  |  |  |
Maximum aggregate offering price | $ 50,000 |  |  |
Shares issued |  |  |  | 543,462
Issuance of common stock |  |  |  | $ 9,500

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