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Revenue Recognition - Disaggregation of Revenue (Details) - Marketwise, LLC - USD ($) $ in Thousands | 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
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Net revenue | $ 141,884 | $ 81,905 | $ 261,225 | $ 157,739 | $ 360,793 | $ 265,398 | $ 232,865
Related party revenue | 246 | 890 | 619 | 1,438 | 3,386 | 6,825 | 5,583
Total net revenue | 142,130 | 82,795 | 261,844 | 159,177 | 364,179 | 272,223 | 238,448
United States |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Total net revenue | 141,599 | 82,163 | 260,873 | 157,773 | 361,547 | 265,647 | 226,167
International |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Total net revenue | 531 | 632 | 971 | 1,404 | 2,632 | 6,576 | 12,281
Lifetime subscriptions |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Total net revenue | 49,867 | 33,035 | 90,031 | 62,088 | 134,525 | 98,578 | 71,215
Term subscriptions |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Total net revenue | 91,017 | 47,584 | 168,500 | 93,834 | 221,740 | 162,062 | 158,475
Non-subscription revenue |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Total net revenue | 1,246 | 2,176 | 3,313 | 3,255 | 7,914 | 11,583 | 8,758
Transferred over time |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Related party revenue | 0 | 0 | 0 | 0 | 0 | 0 | 0
Total net revenue | 140,884 | 80,619 | 258,531 | 155,922 | 356,265 | 260,640 | 229,690
Transferred at a point in time |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Related party revenue | 246 | 890 | 619 | 1,438 | 3,386 | 6,825 | 5,583
Total net revenue | 1,246 | 2,176 | 3,313 | 3,255 | 7,914 | 11,583 | 8,758
Subscriptions |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Net revenue | 140,884 | 80,619 | 258,531 | 155,922 | 356,265 | 260,640 | 229,690
Subscriptions | Transferred over time |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Net revenue | 140,884 | 80,619 | 258,531 | 155,922 | 356,265 | 260,640 | 229,690
Subscriptions | Transferred at a point in time |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Net revenue | 0 | 0 | 0 | 0 | 0 | 0 | 0
Advertising |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Net revenue | 635 | 662 | 1,545 | 1,006 | 1,965 | 2,669 | 3,042
Advertising | Transferred over time |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Net revenue | 0 | 0 | 0 | 0 | 0 | 0 | 0
Advertising | Transferred at a point in time |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Net revenue | 635 | 662 | 1,545 | 1,006 | 1,965 | 2,669 | 3,042
Revenue Share (Third-party) |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Net revenue | 365 | 624 | 1,149 | 811 | 2,563 | 2,089 | 133
Revenue Share (Third-party) | Transferred over time |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Net revenue | 0 | 0 | 0 | 0 | 0 | 0 | 0
Revenue Share (Third-party) | Transferred at a point in time |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Net revenue | $ 365 | $ 624 | $ 1,149 | $ 811 | $ 2,563 | $ 2,089 | $ 133

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