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Business Segments (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2013 segment | Sep. 30, 2012 | Sep. 30, 2011
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of operating segments |  |  |  |  |  |  |  |  | 2 |  |
Net revenue | $ 6,925 | $ 10,398 | $ 8,118 | $ 9,357 | $ 10,945 | $ 24,300 | $ 21,566 | $ 24,728 | $ 34,798 | $ 81,539 | $ 246,705
Operating loss |  |  |  |  |  |  |  |  | (19,994) | (32,984) | 38,279
Capital expenditures |  |  |  |  |  |  |  |  | 178 | 1,306 | 5,183
Depreciation and amortization |  |  |  |  |  |  |  |  | 2,667 | 2,858 | 2,814
Identifiable assets | 110,947 |  |  |  | 129,022 |  |  |  | 110,947 | 129,022 |
Goodwill | 8,481 |  |  |  | 8,355 |  |  |  | 8,481 | 8,355 |
Solar and semiconductor equipment |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  | 26,368 | 73,102 | 233,804
Operating loss |  |  |  |  |  |  |  |  | (14,377) | (26,236) | 46,712
Capital expenditures |  |  |  |  |  |  |  |  | 98 | 1,121 | 5,106
Depreciation and amortization |  |  |  |  |  |  |  |  | 2,501 | 2,717 | 2,589
Identifiable assets | 106,723 |  |  |  | 123,923 |  |  |  | 106,723 | 123,923 |
Goodwill | 7,753 |  |  |  | 7,627 |  |  |  | 7,753 | 7,627 |
Polishing supplies and equipment |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenue |  |  |  |  |  |  |  |  | 8,430 | 8,437 | 12,901
Operating loss |  |  |  |  |  |  |  |  | 1,282 | 1,405 | 3,648
Capital expenditures |  |  |  |  |  |  |  |  | 80 | 185 | 77
Depreciation and amortization |  |  |  |  |  |  |  |  | 166 | 141 | 225
Identifiable assets | 4,224 |  |  |  | 5,099 |  |  |  | 4,224 | 5,099 |
Goodwill | 728 |  |  |  | 728 |  |  |  | 728 | 728 |
Non-segment related loss |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating loss |  |  |  |  |  |  |  |  | $ (6,899) | $ (8,153) | $ (12,081)

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