XML 18 R48.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Commitments and Contingencies (Purchase Obligations) (Details) (USD $) | 12 Months Ended
--- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2010
Commitments and Contingencies Disclosure [Abstract] |  |  |
Purchase obligations |  | $ 12,100,000 |
Losses on inventory purchase commitments | $ 2,455,000 | $ 0 | $ 0

X
- Definition Losses On Firm Inventory Purchase Commitments + References No definition available. + Details
Name: | asys_LossesOnFirmInventoryPurchaseCommitments
Namespace Prefix: | asys_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier. + References No definition available. + Details
Name: | us-gaap_PurchaseObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant