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Balance Sheet Components - Schedule of Accrued Expenses (Details) - USD ($)	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Accrued expenses	$ 2,777,394	$ 111,146
Marketwise, LLC
Property, Plant and Equipment [Line Items]
Commission and bonus	45,456,000	17,271,000	$ 24,570,000
Payroll and benefits	3,437,000	3,645,000	2,520,000
Accrued interest		0	325,000
Other accrued expenses	16,365,000	11,218,000	6,111,000
Accrued expenses	$ 65,258,000	$ 32,134,000	$ 33,526,000

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Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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