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Major Customers and Foreign Sales (Details) - Net Revenues | 3 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Customer Concentration Risk | Customer Number One |  |
Revenue, Major Customer [Line Items] |  |
Concentration risk, percentage |  | 14.00%
Geographic Concentration Risk |  |
Revenue, Major Customer [Line Items] |  |
Concentration risk, percentage | 100.00% | 100.00%
Geographic Concentration Risk | United States |  |
Revenue, Major Customer [Line Items] |  |
Concentration risk, percentage | 18.00% | 28.00%
Geographic Concentration Risk | Other North America |  |
Revenue, Major Customer [Line Items] |  |
Concentration risk, percentage | 2.00% | 3.00%
Geographic Concentration Risk | Total North America |  |
Revenue, Major Customer [Line Items] |  |
Concentration risk, percentage | 20.00% | 31.00%
Geographic Concentration Risk | China |  |
Revenue, Major Customer [Line Items] |  |
Concentration risk, percentage | 26.00% | 20.00%
Geographic Concentration Risk | Malaysia |  |
Revenue, Major Customer [Line Items] |  |
Concentration risk, percentage | 17.00% | 18.00%
Geographic Concentration Risk | Taiwan |  |
Revenue, Major Customer [Line Items] |  |
Concentration risk, percentage | 12.00% | 13.00%
Geographic Concentration Risk | Other Asia |  |
Revenue, Major Customer [Line Items] |  |
Concentration risk, percentage | 6.00% | 3.00%
Geographic Concentration Risk | Total Asia |  |
Revenue, Major Customer [Line Items] |  |
Concentration risk, percentage | 61.00% | 54.00%
Geographic Concentration Risk | Germany |  |
Revenue, Major Customer [Line Items] |  |
Concentration risk, percentage | 5.00% | 2.00%
Geographic Concentration Risk | Other Europe |  |
Revenue, Major Customer [Line Items] |  |
Concentration risk, percentage | 14.00% | 13.00%
Geographic Concentration Risk | Total Europe |  |
Revenue, Major Customer [Line Items] |  |
Concentration risk, percentage | 19.00% | 15.00%

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