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v3.21.2

Intangible Assets - Additional Information (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2019
Finite-Lived Intangible Assets [Line Items] |  |  |
Amortization expense (credit) of intangible assets | $ 0.2 | $ 0.3 | $ 0.3

X
- Definition Amortization expense (credit) of intangible assets. + References No definition available. + Details
Name: | asys_AmortizationExpenseCreditOfIntangibleAssets
Namespace Prefix: | asys_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_FiniteLivedIntangibleAssetsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration