Quarterly report pursuant to Section 13 or 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Summary of Significant Accounting Policies [Line Items]          
Goodwill impairment $ 0 $ 0 $ 0 $ 0  
Intangible asset impairment $ 0 $ 0 $ 0 $ 0  
Payment term     60 days    
Ad serving and creative services 77.20% 98.80% 80.90% 98.60%  
Measurement serving services 22.50% 1.10% 18.80% 0.90%  
Level 1 | Public          
Summary of Significant Accounting Policies [Line Items]          
Exercise price per share (in dollars per share) $ 0.48   $ 0.48   $ 1.11
Fair value $ 1,518,000   $ 1,518,000   $ 3,510,000
Level 3 | Private Placement          
Summary of Significant Accounting Policies [Line Items]          
Fair value 6,072,000   $ 6,072,000   $ 15,462,000
Technology          
Summary of Significant Accounting Policies [Line Items]          
Intangible asset useful life     6 years    
Trade name          
Summary of Significant Accounting Policies [Line Items]          
Intangible asset useful life     8 years    
Software development costs          
Summary of Significant Accounting Policies [Line Items]          
Useful lives (in years)     three years    
Capitalization cost 3,749,000 $ 1,049,000 $ 7,755,000    
Asset Impairment Charges $ 537,000