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Revenues - Additional Information (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2023
USD ($)
Customer
Dec. 31, 2022
USD ($)
Disaggregation Of Revenue [Line Items]    
Subscription contracts term 1 year  
Unsatisfied performance obligation on subscription contract term 1 year  
Revenues $ 17,731 $ 20,019
Number of New customer | Customer 0  
Remaining performance obligation $ 1,283  
Accounts receivable   1,788
Accounts receivable, after allowance for credit loss, current $ 3,864 4,521
Deferred costs expected period of benefit 30 months  
Impairment losses related to costs capitalized $ 0 0
Google [Member]    
Disaggregation Of Revenue [Line Items]    
Revenues $ 7,150 $ 7,150
Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Two Customer [Member]    
Disaggregation Of Revenue [Line Items]    
Concentration Risk, Percentage 24.00%  
Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Google [Member]    
Disaggregation Of Revenue [Line Items]    
Concentration Risk, Percentage 40.00% 36.00%
Outside United States [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member]    
Disaggregation Of Revenue [Line Items]    
Concentration Risk, Percentage 20.00% 21.00%
Maximum [Member]    
Disaggregation Of Revenue [Line Items]    
Subscription contracts term 2 years  
Advance advertiser invoicing period 12 months  
Minimum [Member]    
Disaggregation Of Revenue [Line Items]    
Advance advertiser invoicing period 3 months  
Subscription remaining performance obligations expected duration 1 year