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Commitments and Contingencies Development Project (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2013 | Jun. 30, 2014
Schedule of Equity Method Investments [Line Items] |  |  |  |
Purchases of property, plant and equipment | $ 610 | $ 462 | $ 178 |
Tempress Systems and Energy Research Centre Agreement |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Purchases of property, plant and equipment |  | $ 1,400 |  |
Ownership rights, results of projects developed separately by individual parties |  | 100.00% |  |
Research and development agreement term |  | 4 years |  |
Research and development, required contribution, labor and assets |  |  |  | $ 1,400

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