Segment Information - Schedule of Operating Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Total operating (loss) income	$ (3,658)	$ 4,494	$ (8,529)	$ 6,607
Income (loss) before income taxes	229	3,517	(7,206)	3,378
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Total operating (loss) income	(4,134)	(3,263)	(12,555)	(10,030)
Corporate other expense	3,887	(977)	1,323	(3,229)
Sell-side advertising | Operating Segments
Segment Reporting Information [Line Items]
Total operating (loss) income	(873)	6,206	536	9,657
Buy-side advertising | Operating Segments
Segment Reporting Information [Line Items]
Total operating (loss) income	$ 1,349	$ 1,551	$ 3,490	$ 6,980