Balance Sheet Components - Schedule of Deferred Revenue (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Deferred Revenue Arrangement [Line Items]
Total deferred revenue, current	$ 36,536	$ 45,442
Deferred revenue, non-current	13,889	19,594
Total deferred revenue	50,425	65,036
Platform
Deferred Revenue Arrangement [Line Items]
Total deferred revenue, current	17,873	28,569
Deferred revenue, non-current	7,192	12,783
Player
Deferred Revenue Arrangement [Line Items]
Total deferred revenue, current	18,663	16,873
Deferred revenue, non-current	$ 6,697	$ 6,811