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Balance Sheet Components - Additional Information (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Aug. 31, 2019
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Balance Sheet Related Disclosures [Abstract]            
Depreciation and amortization expenses   $ 1,100 $ 900 $ 3,185 $ 2,435  
Proceeds from sale leaseback of financing obligation $ 1,200          
Lease, term of contract 5 years          
Current portion of finance lease obligation   253   253   $ 237
Long-term portion of finance lease obligation   $ 700   $ 700