CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Revenue	$ 34,241	$ 30,967
Operating expenses:
Platform operations	17,772	14,888
Sales and marketing	10,330	8,058
Technology and development	4,285	2,463
General and administrative	5,601	2,137
Total operating expenses	37,988	27,546
(Loss) income from operations	(3,747)	3,421
Interest expense, net	(109)	(600)
Loss on change in fair value of Seller's Earn-Out	(24,656)	0
Loss on change in fair value of warrants	(15,936)	0
Gain on deconsolidation of SymetryML	1,939	0
Loss on change in fair value of SAFE Notes	(788)	0
Other expense, net	(18)	0
Total other expense, net	(39,568)	(600)
Net (loss) income before benefit (provision) for income taxes	(43,315)	2,821
Benefit (provision) for income taxes	1,025	(988)
Net (loss) income	(42,290)	1,833
Less: Net loss attributable to noncontrolling interest	550	170
Net (loss) income attributable to AdTheorent Holding Company, Inc.	$ (41,740)	$ 2,003
Earnings per share:
Basic	$ (0.49)	$ 0.03
Diluted	$ (0.49)	$ 0.03
Weighted-average common shares outstanding:
Basic	85,743,994	59,853,506
Diluted	85,743,994	60,297,546