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 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Disaggregation of Revenue [Line Items]          
Net revenues $ 68,353,000 $ 70,822,000 $ 138,804,000 $ 144,919,000  
Contract assets 0   0   $ 0
United States          
Disaggregation of Revenue [Line Items]          
Net revenues 60,042,000 61,670,000 122,145,000 125,743,000  
All other countries          
Disaggregation of Revenue [Line Items]          
Net revenues 8,311,000 9,152,000 16,659,000 19,176,000  
Virtual currency (over time) | Over time          
Disaggregation of Revenue [Line Items]          
Net revenues 63,835,000 69,746,000 129,770,000 142,972,000  
Advertising (point in time) | Point in time          
Disaggregation of Revenue [Line Items]          
Net revenues 3,482,000 1,076,000 7,557,000 1,947,000  
Other revenue          
Disaggregation of Revenue [Line Items]          
Net revenues $ 1,036,000 $ 0 $ 1,477,000 $ 0