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v2.4.0.6

Major Customers and Foreign Sales (Details) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2013 Customer | Mar. 31, 2012 Customer | Mar. 31, 2013 Customer | Mar. 31, 2012 Customer
Revenue, Major Customer [Line Items] |  |  |  |
Revenue, number of major customers | 2 | 2 | 0 | 2
Revenues, percentage | 100.00% | 100.00% |  |
Customer Number One [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenue, major customer, percentage | 13.00% | 17.00% |  | 16.00%
Customer Number Two [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenue, major customer, percentage | 10.00% | 11.00% |  | 11.00%
UNITED STATES |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenues, percentage | 24.00% | 7.00% |  |
ASIA [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenues, percentage | 57.00% | 70.00% |  |
CHINA [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenues, percentage | 29.00% | 44.00% |  |
TAIWAN [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenues, percentage | 17.00% | 7.00% |  |
Other [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenues, percentage | 11.00% | 19.00% |  |
EUROPE [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenues, percentage | 19.00% | 23.00% |  |
GERMANY |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenues, percentage | 6.00% | 6.00% |  |
Other [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenues, percentage | 13.00% | 17.00% |  |
Maximum [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenue, major customer, percentage |  |  | 10.00% |

X
- Definition Entity-Wide Revenue, Major Customer, Number + References No definition available. + Details
Name: | asys_EntityWideRevenueMajorCustomerNumber
Namespace Prefix: | asys_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Revenues, Percentage + References No definition available. + Details
Name: | asys_RevenuesPercentage
Namespace Prefix: | asys_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues. + References No definition available. + Details
Name: | us-gaap_EntityWideRevenueMajorCustomerPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration