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Balance Sheet Details - Schedule of Inventory (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Organization Consolidation And Presentation Of Financial Statements [Abstract]    
Raw materials $ 802 $ 802
Work-in-process 3,235 3,213
Finished goods 1,337 1,998
Total inventory, net $ 5,374 $ 6,013