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Segment Information - Schedule of Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Segment Reporting Information [Line Items]        
Total revenues $ 7,984 $ 9,075 $ 26,286 $ 53,205
Operating Segments        
Segment Reporting Information [Line Items]        
Total revenues 7,984 9,075 26,286 53,205
Operating Segments | Sell-side advertising        
Segment Reporting Information [Line Items]        
Total revenues 641 2,202 5,153 33,001
Operating Segments | Buy-side advertising        
Segment Reporting Information [Line Items]        
Total revenues $ 7,343 $ 6,873 $ 21,133 $ 20,204