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Inventories (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Inventories    
Raw materials and purchased parts $ 27,565 $ 28,540
Work in process 1,187 597
Finished goods 36,803 49,146
Inventory reserve (6,211) (5,204)
Total inventories $ 59,344 $ 73,079