Balance Sheet Components - Schedule of Deferred Revenue (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Deferred Revenue Arrangement [Line Items]
Deferred revenue, current portion	$ 45,442	$ 42,950	$ 34,501
Deferred revenue, non-current	19,594	$ 12,023	48,511
Total Deferred Revenue (See Note 3)	65,036		83,012
Player
Deferred Revenue Arrangement [Line Items]
Deferred revenue, current portion	16,873		15,479
Deferred revenue, non-current	6,811		5,837
Platform
Deferred Revenue Arrangement [Line Items]
Deferred revenue, current portion	28,569		19,022
Deferred revenue, non-current	$ 12,783		$ 42,674