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Acquisitions (Details) $ in Thousands | Jan. 30, 2015 USD ($) shares | Dec. 24, 2014 USD ($) | Dec. 31, 2015 USD ($) | Sep. 30, 2015 USD ($)
--- | --- | --- | --- | ---
Business Acquisition [Line Items] |  |  |  |
Goodwill |  |  | $ 10,974 | $ 10,535
SoLayTec, B.V. |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Percentage of voting interests acquired |  | 51.00% |  |
Total purchase price consideration |  | $ 1,900 |  |
Goodwill |  | 3,200 |  |
Identifiable intangible assets |  | $ 2,000 |  |
Parent Company | Merger Agreement |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Conversion ratio, shares of stock exchanged per each share of subsidiary stock | 0.3291 |  |  |
BTU International, Inc (BTU) Merger | Merger Agreement |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Goodwill | $ 5,100 |  |  |
Identifiable intangible assets | $ 2,900 |  |  |
Conversion of stock, shares issued | shares | 3,185,852 |  |  |

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