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Inventories (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]    
Raw materials $ 6,544 $ 1,291
Work-in-process 3,660 3,485
Finished goods 3,837 3,614
Total inventories 14,041 8,390
Reserve for inventory $ 200 $ 200