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Business Segment Information (Details) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2016 USD ($) | Mar. 31, 2015 USD ($) | Mar. 31, 2016 USD ($) segment | Mar. 31, 2015 USD ($) | Sep. 30, 2015 USD ($) | Dec. 24, 2014
Segment Reporting Information [Line Items] |  |  |  |  |  |
Number of business segments | segment |  |  | 3 |  |  |
Net Revenues | $ 22,483 | $ 24,273 | $ 44,557 | $ 36,669 |  |
Operating income (Loss) | (3,607) | (1,936) | (7,535) | (6,728) |  |
Identifiable Assets | 122,728 |  | $ 122,728 |  | $ 125,456 |
Product Concentration Risk | Sales Revenue, Product Line | Semiconductor |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Concentration risk, percentage (less than) |  |  | 25.00% |  |  |
SoLayTec, B.V. |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Percentage of voting interests acquired |  |  |  |  |  | 51.00%
Operating Segments | Solar |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net Revenues | 9,801 | 9,463 | $ 19,344 | 17,749 |  |
Operating income (Loss) | (2,266) | (724) | (4,130) | (3,219) |  |
Identifiable Assets | 46,778 |  | 46,778 |  | 45,717 |
Operating Segments | Semiconductor |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net Revenues | 10,507 | 12,088 | 21,206 | 12,820 |  |
Operating income (Loss) | (119) | 730 | (279) | 630 |  |
Identifiable Assets | 46,640 |  | 46,640 |  | 46,912 |
Operating Segments | Polishing |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net Revenues | 2,175 | 2,722 | 4,007 | 6,100 |  |
Operating income (Loss) | 386 | 601 | 555 | 1,343 |  |
Identifiable Assets | 5,714 |  | 5,714 |  | 5,793 |
Non-Segment |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Operating income (Loss) | (1,608) | $ (2,543) | (3,681) | $ (5,482) |  |
Non-Segment | Non-segment |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Identifiable Assets | $ 23,596 |  | $ 23,596 |  | $ 27,034 |

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