Balance Sheet Components - Schedule of Accounts Payable and Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Accounts Payable And Accrued Liabilities Current [Abstract]
Accounts payable	$ 121,761	$ 115,227
Payments due to content publishers	100,293	57,376
Accrued cost of revenue	63,939	58,149
Operating lease liability, current	32,130	17,896
Accrued royalty expense	10,713	18,040
Accrued payroll and related expenses	21,301	14,522
Accrued inventory	13,444	2,892
Content licensing liability	4,034	1,679
Marketing, retail and merchandising costs	18,592	7,624
Accrued legal fees	4,408	3,158
Customer prepayments	6,807	2,669
Taxes and related liabilities	3,530	3,052
Other accrued expenses	11,846	11,290
Total Accounts Payable and Accrued Liabilities	$ 412,798	$ 313,574