Balance Sheet Components - Schedule of Deferred Revenue (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Deferred Revenue Arrangement [Line Items]
Total deferred revenue, current	$ 35,912	$ 45,442
Deferred revenue, non-current	12,932	19,594
Total deferred revenue	48,844	65,036
Platform
Deferred Revenue Arrangement [Line Items]
Total deferred revenue, current	17,541	28,569
Deferred revenue, non-current	6,221	12,783
Player
Deferred Revenue Arrangement [Line Items]
Total deferred revenue, current	18,371	16,873
Deferred revenue, non-current	$ 6,711	$ 6,811