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Basis of Presentation and Significant Accounting Policies - Impact of Recently Issued Accounting Pronouncements - Additional Information (Details) - USD ($) | Jun. 30, 2020 | Mar. 31, 2020 | Oct. 01, 2019
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New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |  |
ROU assets |  | $ 68,000 | $ 195,000
Lease liabilities |  | $ 62,000 | $ 163,000
Scenario Forecast |  |  |
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |  |
ROU assets | $ 5,000,000.0 |  |
Lease liabilities | $ 5,000,000.0 |  |

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- Definition Lease Liability + References No definition available. + Details
Name: | asys_LeaseLiability
Namespace Prefix: | asys_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Lease right of use asset. + References No definition available. + Details
Name: | asys_LeaseRightOfUseAsset
Namespace Prefix: | asys_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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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_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |