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Intangible Assets, Net (Schedule of intangible assets, net) (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]    
Patent registration costs $ 2,135 $ 2,038
Accumulated amortization 1,538 1,428
Total intangible assets, net $ 597 $ 610