Condensed Consolidated Statement of Stockholders’ Deficit (Unaudited) - USD ($) $ in Thousands	Total	Common Stock - Class A	Common Stock - Class B	Total Stockholders’ Deficit Attributable to MarketWise, Inc.	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)	Noncontrolling Interest
Common stock, beginning balance (in shares) at Dec. 31, 2021					24,718,402	291,092,303
Beginning balance at Dec. 31, 2021	$ (405,262)			$ (48,545)	$ 2	$ 29	$ 0	$ 97,548	$ (146,115)	$ (9)	$ (356,717)
Preferred stock, beginning balance (in shares) at Dec. 31, 2021							0
Stockholders' Deficit
Equity-based compensation	7,190			7,190				7,190
Proceeds from issuance of common stock (in shares)					161,178
Proceeds from issuance of common stock	517			517				517
Issuance of common stock - warrant exchanges (in shares)					5,939,739
Issuance of common stock - warrant exchanges	$ 14,401			14,401	$ 1			14,400
Repurchases of stock (in shares)	(2,484,717)				(2,484,717)
Repurchases of stock	$ (13,054)			(13,054)				(13,054)
Vesting of restricted stock units (in shares)					487,900
Restricted stock units withheld to pay taxes	(511)			(511)				(511)
Acquisition of noncontrolling interest - Chaikin	(297)			(1,257)				(1,257)			960
Distributions	(4,476)										(4,476)
Foreign currency translation adjustments	(100)			(100)						(100)
Net income	73,569			13,694					13,694		59,875
Common stock, ending balance (in shares) at Sep. 30, 2022					28,822,502	291,092,303
Ending balance at Sep. 30, 2022	(328,023)			(27,665)	$ 3	$ 29	$ 0	104,833	(132,421)	(109)	(300,358)
Preferred stock, ending balance (in shares) at Sep. 30, 2022							0
Common stock, beginning balance (in shares) at Jun. 30, 2022					22,505,103	291,092,303
Beginning balance at Jun. 30, 2022	(359,607)			(38,445)	$ 2	$ 29	$ 0	90,048	(128,409)	(115)	(321,162)
Preferred stock, beginning balance (in shares) at Jun. 30, 2022							0
Stockholders' Deficit
Equity-based compensation	2,153			2,153				2,153
Issuance of common stock - warrant exchanges (in shares)					5,939,739
Issuance of common stock - warrant exchanges	14,401			14,401	$ 1			14,400
Vesting of restricted stock units (in shares)					377,660
Restricted stock units withheld to pay taxes	(511)			(511)				(511)
Acquisition of noncontrolling interest - Chaikin	(297)			(1,257)				(1,257)			960
Distributions	(677)										(677)
Foreign currency translation adjustments	6			6						6
Net income	16,509			(4,012)					(4,012)		20,521
Common stock, ending balance (in shares) at Sep. 30, 2022					28,822,502	291,092,303
Ending balance at Sep. 30, 2022	(328,023)			(27,665)	$ 3	$ 29	$ 0	104,833	(132,421)	(109)	(300,358)
Preferred stock, ending balance (in shares) at Sep. 30, 2022							0
Common stock, beginning balance (in shares) at Dec. 31, 2022		29,039,655	291,092,303		29,039,655	291,092,303
Beginning balance at Dec. 31, 2022	$ (298,383)			(21,197)	$ 3	$ 29	$ 0	106,852	(128,125)	44	(277,186)
Preferred stock, beginning balance (in shares) at Dec. 31, 2022	0						0
Stockholders' Deficit
Equity-based compensation	$ 10,313			10,313				10,313
Proceeds from issuance of common stock (in shares)					648,849
Proceeds from issuance of common stock	$ 332			332				332
Repurchases of stock (in shares)	0
Vesting of restricted stock units (in shares)					1,657,933
Restricted stock units withheld to pay taxes	$ (1,521)			(1,521)				(1,521)
Cash dividends declared	(902)			(902)				(902)
Distributions	(9,212)										(9,212)
Issuance per redemption of Class B shares for Class A (in shares)			(2,750,000)		(2,750,000)	(2,750,000)
Issuance per redemption of Class B shares for Class A	370			(1,935)				(1,935)			2,305
Foreign currency translation adjustments	11			11						11
Net income	52,392			1,643					1,643		50,749
Common stock, ending balance (in shares) at Sep. 30, 2023		34,096,437	288,342,303		34,096,437	288,342,303
Ending balance at Sep. 30, 2023	$ (246,600)			(13,256)	$ 3	$ 29	$ 0	113,139	(126,482)	55	(233,344)
Preferred stock, ending balance (in shares) at Sep. 30, 2023	0						0
Common stock, beginning balance (in shares) at Jun. 30, 2023					32,073,995	289,842,303
Beginning balance at Jun. 30, 2023	$ (257,251)			(14,414)	$ 3	$ 29	$ 0	112,146	(126,622)	30	(242,837)
Preferred stock, beginning balance (in shares) at Jun. 30, 2023							0
Stockholders' Deficit
Equity-based compensation	$ 2,932			2,932				2,932
Repurchases of stock (in shares)	0
Vesting of restricted stock units (in shares)					522,442
Restricted stock units withheld to pay taxes	$ (415)			(415)				(415)
Cash dividends declared	(462)			(462)				(462)
Distributions	(3,649)										(3,649)
Issuance per redemption of Class B shares for Class A (in shares)			(1,500,000)		(1,500,000)	(1,500,000)
Issuance per redemption of Class B shares for Class A	176			(1,062)				(1,062)			1,238
Foreign currency translation adjustments	25			25						25
Net income	12,044			140					140		11,904
Common stock, ending balance (in shares) at Sep. 30, 2023		34,096,437	288,342,303		34,096,437	288,342,303
Ending balance at Sep. 30, 2023	$ (246,600)			$ (13,256)	$ 3	$ 29	$ 0	$ 113,139	$ (126,482)	$ 55	$ (233,344)
Preferred stock, ending balance (in shares) at Sep. 30, 2023	0						0