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Financial Statement Components - Schedule of Accrued and Other Current Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Financial Statement Components [Abstract]    
Accrued expenses $ 3,130 $ 2,148
Accrued compensation and benefits 8,657 7,456
Accrued and other current liabilities $ 11,787 $ 9,604