Balance Sheet Components - Schedule of Deferred Revenue (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Deferred Revenue Arrangement [Line Items]
Total deferred revenue, current	$ 41,939	$ 45,442
Deferred revenue, non-current	15,297	19,594
Total deferred revenue	57,236	65,036
Platform
Deferred Revenue Arrangement [Line Items]
Total deferred revenue, current	24,789	28,569
Deferred revenue, non-current	8,783	12,783
Player
Deferred Revenue Arrangement [Line Items]
Total deferred revenue, current	17,150	16,873
Deferred revenue, non-current	$ 6,514	$ 6,811