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Major Customers and Foreign Sales (Details) - Customer | 12 Months Ended
--- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2013
Revenue, Major Customer [Line Items] |  |  |
Revenue, number of major customers | 2 | 2 | 1
Revenues, percentage | 100.00% | 100.00% | 100.00%
United States |  |  |
Revenue, Major Customer [Line Items] |  |  |
Revenues, percentage | 24.00% | 21.00% | 20.00%
Other |  |  |
Revenue, Major Customer [Line Items] |  |  |
Revenues, percentage | 2.00% | 0.00% | 0.00%
Total Americas |  |  |
Revenue, Major Customer [Line Items] |  |  |
Revenues, percentage | 26.00% | 21.00% | 20.00%
Taiwan |  |  |
Revenue, Major Customer [Line Items] |  |  |
Revenues, percentage | 13.00% | 16.00% | 14.00%
China |  |  |
Revenue, Major Customer [Line Items] |  |  |
Revenues, percentage | 26.00% | 14.00% | 39.00%
Other |  |  |
Revenue, Major Customer [Line Items] |  |  |
Revenues, percentage | 8.00% | 12.00% | 8.00%
Total Asia |  |  |
Revenue, Major Customer [Line Items] |  |  |
Revenues, percentage | 60.00% | 45.00% | 64.00%
Germany |  |  |
Revenue, Major Customer [Line Items] |  |  |
Revenues, percentage | 5.00% | 16.00% | 5.00%
Other |  |  |
Revenue, Major Customer [Line Items] |  |  |
Revenues, percentage | 9.00% | 18.00% | 11.00%
Total Europe |  |  |
Revenue, Major Customer [Line Items] |  |  |
Revenues, percentage | 14.00% | 34.00% | 16.00%
Customer Number One |  |  |
Revenue, Major Customer [Line Items] |  |  |
Revenue, major customer, percentage | 15.00% | 18.00% | 20.00%
Customer Number Two |  |  |
Revenue, Major Customer [Line Items] |  |  |
Revenue, major customer, percentage | 11.00% | 11.00% |

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