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Balance Sheet Account Detail - Inventories (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Balance Sheet Related Disclosures [Abstract]    
Raw materials $ 5,362 $ 4,636
Work-in-process 4,132 6,401
Finished goods 16,911 19,362
Total Inventories $ 26,405 $ 30,399