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RELATED PARTY TRANSACTIONS - Additional Information (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Related Party Transaction [Line Items]      
Educator partners payable $ 101,041 $ 66,375  
Content Sourcing Agreement      
Related Party Transaction [Line Items]      
Related party content fees 7,401 5,679 $ 6,558
Content Sourcing Agreement | Related Party      
Related Party Transaction [Line Items]      
Educator partners payable $ 3,895 $ 1,223