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Balance Sheets Components - Schedule of Future Amortization Expense for Intangible Assets (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Finite Lived Intangible Assets Future Amortization Expense Current And Five Succeeding Fiscal Years [Abstract]    
2020 (remainder) $ 317  
2021 1,177  
2022 469  
2023 140  
Intangible assets, net $ 2,103 $ 4,489