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Select Balance Sheet and Statement of Operations Information - Schedule of Inventory (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Inventory Disclosure [Abstract]    
Raw materials $ 678 $ 877
Work-in-progress 789 2,067
Finished goods 18,026 15,900
Total inventory $ 19,493 $ 18,844