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Inventory (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Raw materials $ 1,275 $ 481
Work-in-process 8,634 3,488
Finished goods 6,596 6,436
Total inventories 16,505 10,405
Inventories - current 11,400 6,967
Inventories-noncurrent $ 5,105 $ 3,438
JAKAFI    
Shelf life for finished goods inventory, maximum 36 months