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Inventories (Inventories) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Inventories [Abstract]    
Components $ 19,630 $ 13,822
Work in process 10,123 6,019
Finished products [1] 14,399 6,753
Total inventories 44,152 26,594
Current assets 39,736 23,803
Long-term assets (A) $ 4,416 $ 2,791
[1] includes systems at customer locations not yet sold, as of December 31, 2020 and 2019, in the amount of $10,613 and $3,498 respectively.