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Marketable Securities - Schedule of Investments in Unrealized Loss Position and for which an Other-than-Temporary Impairment has not been Recognized in Earnings (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
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Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract] |  |
Aggregate fair value of investments with unrealized losses | $ 22,391 | $ 33,578
Aggregate amount of unrealized losses | $ (4) | $ (14)

X
- Definition Held to maturity securities continuous unrealized losses position fair value. + References No definition available. + Details
Name: | avdx_HeldToMaturitySecuritiesContinuousUnrealizedLossesPositionFairValue
Namespace Prefix: | avdx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Other than temporary impairment, amount of unrealized losses, not recognized in earnings. + References No definition available. + Details
Name: | avdx_OtherThanTemporaryImpairmentAmountOfUnrealizedLossesNotRecognizedInEarnings
Namespace Prefix: | avdx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration