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Note 9 - Intangible Assets, Net - Finite-lived Intangible Assets (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Intangible assets, gross amount $ 9,990 $ 9,640
Intangible assets, accumulated amortization (6,327) (6,012)
Intangible assets, net 3,663 3,628
Patents [Member]    
Intangible assets, gross amount 9,788 9,502
Intangible assets, accumulated amortization (6,278) (5,981)
Intangible assets, net 3,510 3,521
Trademarks [Member]    
Intangible assets, gross amount 202 138
Intangible assets, accumulated amortization (49) (31)
Intangible assets, net $ 153 $ 107