Stockholders’ Equity - Narrative (Details) $ / shares in Units, $ in Thousands						3 Months Ended	9 Months Ended		23 Months Ended
	Oct. 26, 2023 USD ($)	Oct. 18, 2023 USD ($) $ / shares	Aug. 03, 2023 USD ($) $ / shares	Jul. 20, 2023 USD ($)	May 11, 2023 USD ($) $ / shares	Sep. 30, 2023 USD ($) $ / shares shares	Sep. 30, 2023 USD ($) vote $ / shares shares	Sep. 30, 2022 USD ($) shares	Sep. 30, 2023 USD ($) $ / shares shares	Dec. 31, 2022 $ / shares	Nov. 04, 2021 USD ($)
Class of Stock [Line Items]
Common stock, number of votes per share | vote							1
Common stock, conversion ratio						1	1		1
Common stock, dividend (in dollars per share) | $ / shares						$ 0.01	$ 0.01
Dividends, common stock				$ 300		$ 462	$ 902
Distribution (in dollars per share) | $ / shares			$ 0.01		$ 0.01
Distributions			$ 2,900	$ 2,900	$ 2,900
Share repurchase program, amount authorized											$ 35,000
Shares repurchased (in shares) | shares						0	0	2,484,717	2,984,987
Repurchases of stock							$ 0	$ 13,054
Fees and commissions								$ 25
Aggregate value of shares to be repurchased						$ 18,600	$ 18,600		$ 18,600
Number of common units redeemed for each share of Class A common stock repurchased (in shares) | shares						1	1		1
Subsequent Event
Class of Stock [Line Items]
Dividends, common stock	$ 300
Distributions	$ 2,900
Marketwise, LLC
Class of Stock [Line Items]
Ownership percentage						10.60%	10.60%	9.00%	10.60%
Ownership percentage						89.40%	89.40%	91.00%	89.40%
Sponsor Earn Out Shares
Class of Stock [Line Items]
Earn out shares (in shares) | shares						3,051,000	3,051,000		3,051,000
Management Earn Out Shares
Class of Stock [Line Items]
Earn out shares (in shares) | shares						2,000,000	2,000,000		2,000,000
Common Stock - Class A
Class of Stock [Line Items]
Common stock, par value (USD per share) | $ / shares						$ 0.0001	$ 0.0001		$ 0.0001	$ 0.0001
Common stock, dividend (in dollars per share) | $ / shares			$ 0.01		$ 0.01
Dividends, common stock			$ 500		$ 400
Stock issued during period, conversion of units (in shares) | shares						1,500,000	2,750,000
Common Stock - Class A | Subsequent Event
Class of Stock [Line Items]
Common stock, dividend (in dollars per share) | $ / shares		$ 0.15
Dividends, common stock		$ 50,000
Common Stock - Class B
Class of Stock [Line Items]
Common stock, par value (USD per share) | $ / shares						$ 0.0001	$ 0.0001		$ 0.0001	$ 0.0001
Issuance per redemption of Class B shares for Class A (in shares) | shares						1,500,000	2,750,000
MarketWise, LLC Units
Class of Stock [Line Items]
Issuance per redemption of Class B shares for Class A (in shares) | shares						1,500,000	2,750,000