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v3.19.2

Contracts with Customers (Details) | 9 Months Ended
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Jun. 30, 2019 segment
Disaggregation of Revenue [Line Items] |
Number of reportable segments | 3
Warranty period | 12 months
Period of contract | 1 year
Amortization period | 1 year
Semiconductor | Minimum |
Disaggregation of Revenue [Line Items] |
Percentage of contract price | 80.00%
Semiconductor | Maximum |
Disaggregation of Revenue [Line Items] |
Percentage of contract price | 90.00%
Equipment Sales | Minimum |
Disaggregation of Revenue [Line Items] |
Warranty period | 12 months
Equipment Sales | Maximum |
Disaggregation of Revenue [Line Items] |
Warranty period | 24 months

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- Definition Contract With Customer, Amortization Period + References No definition available. + Details
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Namespace Prefix: | asys_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Contract With Customer, Percentage Of Contract Price + References No definition available. + Details
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Namespace Prefix: | asys_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Contract With Customer, Term Of Contract + References No definition available. + Details
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Namespace Prefix: | asys_
Data Type: | xbrli:durationItemType
Balance Type: | na
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
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Namespace Prefix: | us-gaap_
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Period Type: | duration

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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
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- Definition Period in which remaining performance obligation is expected to be recognized as revenue, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130556-203045 + Details
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |