Certain Balance Sheet Components Summary of the Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Beginning balance	$ 4,360	$ 4,552	$ 6,331	$ 3,957
Provision for (release of) doubtful accounts, net	(1)	(105)	(1,739)	1,149
Accounts written-off	(468)	(624)	(740)	(1,129)
Effect of change in exchange rates	(105)	(1)	(66)	(155)
Ending balance	$ 3,786	$ 3,822	$ 3,786	$ 3,822