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Inventory (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Inventory Disclosure [Abstract]    
Raw materials $ 1,875 $ 1,400
Work-in-process 21,648 13,414
Finished goods 3,536 6,240
Total inventory 27,059 $ 21,054
Idle capacity $ 17,000