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Subsequent Event (Details) - USD ($) $ in Millions | Jan. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Subsequent Event [Line Items] |  |
Cash, cash equivalents, and restricted cash |  | $ 26.9
Subsequent Event |  |
Subsequent Event [Line Items] |  |
Cash, cash equivalents, and restricted cash | $ 45.8 |

X
- Definition Cash, Cash Equivalents, And Restricted Cash + References No definition available. + Details
Name: | asys_CashCashEquivalentsAndRestrictedCash
Namespace Prefix: | asys_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |