Income Taxes - Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($) shares	Sep. 30, 2022	Sep. 30, 2023 USD ($) shares	Sep. 30, 2022	Dec. 31, 2022 USD ($)
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Effective income tax rate	5.40%	7.70%	3.80%	5.10%
Valuation allowance	$ 29,088,000		$ 29,088,000
Tax savings rate			0.85
Tax receivable agreement, percent of calculated tax savings retained	0.15		0.15
Tax receivable agreement liability, noncurrent	$ 2,096,000		$ 2,096,000		$ 0
Unrecognized tax positions	0		0
Change to uncertain tax positions within the next 12 months	$ 0		$ 0
Common Stock - Class B
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Issuance per redemption of Class B shares for Class A (in shares) | shares	1,500,000		2,750,000
MarketWise, LLC Units
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Issuance per redemption of Class B shares for Class A (in shares) | shares	1,500,000		2,750,000
Common Stock - Class A
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Stock issued during period, conversion of units (in shares) | shares	1,500,000		2,750,000