Quarterly report pursuant to Section 13 or 15(d)

REVENUE FROM CONTRACTS WITH CUSTOMERS (Details)

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REVENUE FROM CONTRACTS WITH CUSTOMERS (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Disaggregation of Revenue [Line Items]          
Net revenues $ 72,127,000 $ 70,571,000 $ 210,931,000 $ 215,490,000  
Contract assets 0   0   $ 0
United States          
Disaggregation of Revenue [Line Items]          
Net revenues 63,501,000 61,670,000 185,646,000 187,319,000  
All other countries          
Disaggregation of Revenue [Line Items]          
Net revenues 8,626,000 8,901,000 25,285,000 28,171,000  
Virtual currency (over time) | Over time          
Disaggregation of Revenue [Line Items]          
Net revenues 65,607,000 69,255,000 195,377,000 212,226,000  
Advertising (point in time) | Point in time          
Disaggregation of Revenue [Line Items]          
Net revenues 3,807,000 1,316,000 11,364,000 3,264,000  
Other revenue          
Disaggregation of Revenue [Line Items]          
Net revenues $ 2,713,000 $ 0 $ 4,190,000 $ 0