Financial Statement Components - Schedule of Accounts Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounts Receivable
Allowance for doubtful accounts	$ (11)	$ (12)		$ (33)	$ (12)
Accounts receivable, net	37,655	24,797	$ 24,797
Trade accounts receivable
Accounts Receivable
Trade accounts receivable	34,591	23,068
Unbilled trade accounts receivable, net of advance client deposits
Accounts Receivable
Trade accounts receivable	$ 3,075	$ 1,741