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Note 11 - Common Stock Warrant Liability (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Apr. 30, 2025
Dec. 31, 2024
Jul. 31, 2024
Jun. 30, 2024
Fair Value Adjustment of Warrants $ (50) $ (2,166) $ (292) $ (2,166)        
July 2024 Warrants [Member]                
Warrants and Rights Outstanding, Term (Year)             5 years  
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)         $ 1.1   $ 205.5 $ 1.9714
Warrants and Rights Outstanding           $ 300 $ 10,800  
Fair Value Adjustment of Warrants $ (100)   $ 300