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Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended
--- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2012
Income Statement [Abstract] |  |  |
Revenue, net of returns and allowances | $ 56,501 | $ 34,798 | $ 81,539
Cost of sales | 44,581 | 26,833 | 59,511
Write-down of inventory | 294 | 3,652 | 10,380
Losses on inventory purchase commitments | 0 | 0 | 2,455
Gross profit | 11,626 | 4,313 | 9,193
Selling, general and administrative | 18,424 | 16,830 | 23,055
Research and development | 6,291 | 6,594 | 13,694
Impairment and restructuring charges | 0 | 883 | 5,428
Operating loss | (13,089) | (19,994) | (32,984)
Interest and other income, net | 40 | 147 | 66
Loss before income taxes | (13,049) | (19,847) | (32,918)
Income tax provision (benefit) | 1,240 | 1,860 | (5,320)
Net loss | (14,289) | (21,707) | (27,598)
Add: net loss attributable to noncontrolling interest | 1,242 | 1,638 | 4,567
Net loss attributable to Amtech Systems, Inc. | $ (13,047) | $ (20,069) | $ (23,031)
Income (Loss) Per Share: |  |  |
Basic income (loss) per share attributable to Amtech shareholders (dollars per share) | $ (1.34) | $ (2.11) | $ (2.43)
Weighted average shares outstanding (in shares) | 9,732 | 9,529 | 9,471
Diluted income (loss) per share attributable to Amtech shareholders (dollars per share) | $ (1.34) | $ (2.11) | $ (2.43)
Weighted average shares outstanding (in shares) | 9,732 | 9,529 | 9,471

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