Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Significant Accounting Policies [Line Items]
Income tax expense	$ 691	$ 1,383	$ 2,046	$ 3,945
Gain (loss) on derivative warrant liabilities		$ (3,868)		$ 14,931
Marketwise, LLC
Significant Accounting Policies [Line Items]
Ownership percentage	10.60%	9.00%	10.60%	9.00%
Noncontrolling interest ownership percentage	89.40%	91.00%	89.40%	91.00%