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Balance Sheet Components - Schedule of Change to Accrued Warranty (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Standard Product Warranty Disclosure [Abstract]    
Beginning balance $ 706 $ 488
Warranties assumed due to acquisition 1,174 180
Fulfillment of assumed acquisition warranty (387)  
Provision increase, net 282 38
Ending balance $ 1,775 $ 706