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Fair Value Measurements - Schedule of Changes in Fair Value of Warrants (Details) - USD ($) | 3 Months Ended | 11 Months Ended
--- | --- | ---
Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020
Class of Warrant or Right [Line Items] |  |  |
Beginning balance |  | $ 53,801,110 | $ 25,275,880
Change in fair value of derivative warrant liabilities |  |  | 28,525,230
Ending balance | $ 50,497,400 |  | 53,801,110
Private Warrants |  |  |
Class of Warrant or Right [Line Items] |  |  |
Beginning balance | 10,653,560 | 18,415,060 |
Change in fair value of derivative warrant liabilities | 6,102,840 | (7,761,500) |
Ending balance | $ 16,756,400 | $ 10,653,560 | $ 18,415,060

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- Definition Change in Fair Value of Derivative Warrant Liabilities + References No definition available. + Details
Name: | acnd_ChangeInFairValueOfDerivativeWarrantLiabilities
Namespace Prefix: | acnd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price. + References No definition available. + Details
Name: | us-gaap_WarrantsAndRightsOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=acnd_PrivateWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |