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Related Party Transactions (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2016 | Mar. 31, 2016 | Mar. 31, 2015 | Sep. 30, 2015
Related Party Transaction [Line Items] |  |  |  |
Gain on sale of exclusive rights |  | $ 2,576 | $ 0 |
Kingstone Holding Company |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Equity method investment, ownership percentage | 15.00% | 15.00% |  | 15.00%
Accounts Receivable | Kingstone Hong Kong |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Due from related parties | $ 500 | $ 500 |  |
Exclusive Sales And Service Rights In Solar Ion Implant Equipment |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Proceeds from sale of exclusive rights | 4,900 |  |  |
Gain on sale of exclusive rights | $ 2,600 | $ 2,600 |  |

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