v3.20.4
Licensed Content Assets - Additional Information (Details) - USD ($)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Licensed Content Assets [Line Items]    
Change in accounting principle, accounting standards update, adopted [true false] true  
Change in accounting principle, accounting standards update, adoption date Jan. 01, 2020  
Change in accounting principle, accounting standards update, immaterial effect [true false] true  
Accounting Standards Update Extensible List us-gaap:AccountingStandardsUpdate201902Member  
Licensed content expenses $ 7,900,000 $ 1,700,000
Amortization of content assets 22,392,000 2,914,000
Impairment of capitalized licensed content assets 0 $ 0
Licensed Content Assets    
Licensed Content Assets [Line Items]    
Impairment of capitalized licensed content assets $ 0