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Inventories (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Inventory Disclosure [Abstract]    
Raw materials $ 7,619 $ 5,547
Work-in-process 11,306 7,693
Finished goods 5,161 6,316
Total inventories 24,086 19,556
Reserve for inventory $ 200 $ 100