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Inventory (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Inventory Disclosure [Abstract]    
Raw materials $ 1,878 $ 1,400
Work-in-process 14,190 13,414
Finished goods 4,157 6,240
Total inventory 20,225 $ 21,054
Idle capacity $ 3,500