Annual report pursuant to Section 13 and 15(d)

Significant Balance Sheet Components - Schedule of Warranty Liability Which is Included in Accrued Expenses on Consolidated Balance Sheet (Details)

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Significant Balance Sheet Components - Schedule of Warranty Liability Which is Included in Accrued Expenses on Consolidated Balance Sheet (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Significant Balance Sheet Components [Abstract]    
Beginning balance $ 1,103 $ 1,742
Additions 1,157 355
Cost of warranty claims (1,106) (994)
Ending balance $ 1,154 $ 1,103