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Inventories - Components of Inventory, Net (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Inventory Disclosure [Abstract]    
Raw materials $ 1,544 $ 1,123
Work in-process 2,447 1,337
Finished goods 94 195
Inventories, net $ 4,085 $ 2,655