Condensed Consolidated Statements of Stockholders' Deficit / Members' Deficit (Unaudited) - USD ($) $ in Thousands	Total	Marketwise, LLC	Class A Members’ units	Common Stock Common Stock - Class A	Common Stock Common Stock - Class B	Preferred Stock	Additional paid-in capital	Accumulated deficit	Accumulated Other Comprehensive Income (Loss)	Total Stockholders’ Deficit / Members’ Deficit Attributable to MarketWise, Inc.	Noncontrolling Interest
Class A members' units, beginning balance (in shares) at Dec. 31, 2020			547,466
Class A members' units, beginning balance at Dec. 31, 2020	$ (920,610)		$ (914,728)						$ (17)	$ (914,745)	$ (5,865)
Members' Deficit
Class A units transferred to Class B (in shares)			(18,947)
Acquisition of Chaikin	810										810
Foreign currency translation adjustments	(17)								(17)	(17)
Distributions	(14,167)		$ (13,917)							(13,917)	(250)
Net income (loss)	(615,083)		$ (614,453)							(614,453)	(630)
Class A members' units, ending balance (in shares) at Mar. 31, 2021			528,519
Class A members' units, ending balance at Mar. 31, 2021	(1,549,067)		$ (1,543,098)						(34)	(1,543,132)	(5,935)
Stockholders' Deficit
Foreign currency translation adjustments	(17)								(17)	(17)
Net income (loss)	(615,083)		$ (614,453)							(614,453)	(630)
Income tax provision	0
Controlling interests	(614,453)
Noncontrolling interests	(630)
Foreign currency translation adjustments	(17)								(17)	(17)
Net income (loss)	23,023							$ 5,825		5,825	17,198
Beginning balance (in shares) at Dec. 31, 2021				24,718,402	291,092,303	0
Beginning balance at Dec. 31, 2021	(405,262)			$ 2	$ 29	$ 0	$ 97,548	(146,115)	(9)	(48,545)	(356,717)
Stockholders' Deficit
Equity-based compensation	$ 2,588						2,588			2,588
Repurchase of stock (in shares)	(2,143,446)			(2,143,446)
Repurchases of stock	$ (11,491)						(11,491)			(11,491)
Distributions	(2,852)										(2,852)
Foreign currency translation adjustments	(17)								(17)	(17)
Net income (loss)	23,023							5,825		5,825	17,198
Ending balance (in shares) at Mar. 31, 2022				22,574,956	291,092,303	0
Ending balance at Mar. 31, 2022	(394,011)			$ 2	$ 29	$ 0	$ 88,645	$ (140,290)	$ (26)	$ (51,640)	$ (342,371)
Stockholders' Deficit
Gain on derivative warrant liabilities	6,700
Income tax provision	1,522
Controlling interests	5,825
Noncontrolling interests	$ 17,198
Ownership percentage		7.20%
Noncontrolling interest ownership percentage		92.80%