Segment Information - Operating (loss) income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
(Loss) income from operations	$ (13,233)	$ (2,185)
Loss before income taxes	(13,775)	(6,276)
Corporate
Segment Reporting Information [Line Items]
(Loss) income from operations	(16,655)	(14,851)
Corporate other expense	(542)	(4,091)
Sell-side advertising | Operating
Segment Reporting Information [Line Items]
(Loss) income from operations	(579)	4,874
Buy-side advertising | Operating
Segment Reporting Information [Line Items]
(Loss) income from operations	$ 4,001	$ 7,792