Quarterly report pursuant to Section 13 or 15(d)

Balance Sheet Components - Schedule of Accrued Payroll (Details)

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Balance Sheet Components - Schedule of Accrued Payroll (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Payables And Accruals [Abstract]    
Accrued bonuses $ 1,306 $ 3,086
Accrued wages and other payroll related items 3,803 2,453
Accrued vacation 1,498 1,338
Accrued payroll $ 6,607 $ 6,877