Annual report pursuant to Section 13 and 15(d)

REVENUE FROM CONTRACTS WITH CUSTOMERS (Details)

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REVENUE FROM CONTRACTS WITH CUSTOMERS (Details) - USD ($)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disaggregation of Revenue [Line Items]      
Net revenue $ 290,309,000 $ 287,419,000 $ 269,882,000
Contract assets 0 0  
United States      
Disaggregation of Revenue [Line Items]      
Net revenue 253,556,000 250,252,000 228,568,000
All other countries      
Disaggregation of Revenue [Line Items]      
Net revenue 36,753,000 37,167,000 41,314,000
Over time | Virtual currency (over time)      
Disaggregation of Revenue [Line Items]      
Net revenue 261,620,000 280,087,000 268,137,000
Point in time | Advertising (point in time)      
Disaggregation of Revenue [Line Items]      
Net revenue 21,839,000 6,964,000 1,745,000
Point in time | Other revenue (point in time)      
Disaggregation of Revenue [Line Items]      
Net revenue $ 6,850,000 $ 368,000 $ 0