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v3.22.0.1

Subsequent Events (Q3) (Details) - USD ($) | 1 Months Ended |
--- | --- | ---
Oct. 28, 2021 | Sep. 30, 2021
Subsequent Event [Member] |  |
Subsequent Events (Details) [Line Items] |  |
Working capital loans (in Dollars) | $ 1,500,000 |
Common stock [Member] |  |
Subsequent Events (Details) [Line Items] |  |
Price per unit (in dollars per share) |  | $ 0.0001
Class A Ordinary Shares [Member] |  |
Subsequent Events (Details) [Line Items] |  |
Price per unit (in dollars per share) |  | 0.0001
Class B Ordinary Shares [Member] |  |
Subsequent Events (Details) [Line Items] |  |
Price per unit (in dollars per share) |  | $ 0.0001

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- Definition Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction. + References No definition available. + Details
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Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | wald_
Data Type: | xbrli:stringItemType
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Period Type: | duration

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- Definition The amount of working capital loans. + References No definition available. + Details
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Namespace Prefix: | wald_
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Balance Type: | debit
Period Type: | duration

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- Details
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- Details
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- Details
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- Details
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Balance Type: |
Period Type: |