XML 84 R52.htm IDEA: XBRL DOCUMENT v3.21.2
Revenue Recognition - Narrative (Details) - Marketwise, LLC - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]              
Contract liability, revenue recognized $ 81,840,000 $ 48,907,000 $ 176,678,000 $ 112,978,000 $ 190,778,000 $ 171,273,000  
Accounts receivable 8,965,000   8,965,000   12,398,000 7,332,000 $ 818,000
Impairment on capitalized costs         0 $ 0 $ 0
Remaining performance obligation $ 707,472,000   $ 707,472,000   $ 532,748,000    
Remaining performance obligation, percentage 46.00%   46.00%        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01              
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]              
Remaining performance obligation, percentage         52.00%    
Remaining performance obligation, timing of satisfaction         12 months    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01              
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]              
Remaining performance obligation, timing of satisfaction         12 months