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, 2020
Dec. 31, 2019
Payables And Accruals [Abstract]    
Accrued bonuses $ 1,143 $ 87
Accrued wages and other payroll related items 4,939 3,158
Accrued vacation 2,262 2,169
Accrued employee stock purchase plan deductions 306 801
Accrued payroll $ 8,650 $ 6,215