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Basis of Presentation - Concentrations of Credit Risk (Details) | 6 Months Ended
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Mar. 31, 2015 Customers
Accounts Receivable [Member] |
Concentration Risk [Line Items] |
Number of customers | 1 asys_NumberOfCustomers / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember
Accounts Receivable [Member] | Customer One [Member] |
Concentration Risk [Line Items] |
Concentration risk, percentage | 12.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = asys_CustomerOneMember
UNITED STATES | Cash and Cash Equivalents and Restricted Cash [Member] |
Concentration Risk [Line Items] |
Concentration risk, percentage | 60.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = asys_CashAndCashEquivalentsAndRestrictedCashMember / us-gaap_StatementGeographicalAxis = country_US

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- Definition Number Of Customers + References No definition available. + Details
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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 + Details
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- Details
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