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Inventory (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Inventory    
Raw materials $ 1,275 $ 1,275
Work-in-process 37,307 21,242
Finished goods 13,678 13,456
Total inventories 52,260 35,973
Inventories - current 16,675 16,425
Inventories-noncurrent $ 35,585 $ 19,548