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Note 15 - Fair Value Measurement and Financial Instruments (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Jan. 25, 2022
Jan. 24, 2022
Canter Loan [Member]        
Fair Value, Option, Aggregate Differences, Long-Term Debt Instruments   $ 22    
The 8.63 Warrants [Member]        
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) $ 8.63 $ 8.63 $ 8.63 $ 11.5