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Transactions with Related Parties - Additional Information (Details)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of transactions between related parties [line items]      
Parent entity GungHo Online Entertainment, Inc.    
Number of related party transactions 0 0 0
GungHo Online Entertainment, Inc      
Disclosure of transactions between related parties [line items]      
Percentage of ownership held by related party 59.31%