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Segment Information - Schedule of Assets (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Segment Reporting Information [Line Items]    
Total assets $ 22,535 $ 26,006
Operating Segments    
Segment Reporting Information [Line Items]    
Total assets 19,649 22,419
Operating Segments | Sell-side advertising    
Segment Reporting Information [Line Items]    
Total assets 2,454 3,755
Operating Segments | Buy-side advertising    
Segment Reporting Information [Line Items]    
Total assets 17,195 18,664
Corporate, Non-Segment    
Segment Reporting Information [Line Items]    
Total assets $ 2,886 $ 3,587