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Selected Quarterly Data (Unaudited) | 12 Months Ended
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Sep. 30, 2015
Selected Quarterly Data (Unaudited) [Abstract] |
Selected Quarterly Data (Unaudited) | Selected Quarterly Data (Unaudited)
| First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter
Fiscal Year 2015: | (in thousands, except per share amounts)
Revenue | $ | 12,396 |  |  | $ | 24,273 |  |  | $ | 40,016 |  |  | $ | 28,198 |
Gross margin | $ | 3,428 |  |  | $ | 6,889 |  |  | $ | 10,128 |  |  | $ | 6,563 |
Provision for income taxes | $ | 180 |  |  | $ | 170 |  |  | $ | 290 |  |  | $ | 1,270 |
Net income (loss) attributable to Amtech Systems, Inc. | $ | (5,195 | ) |  | $ | (2,321 | ) |  | $ | (1,604 | ) |  | $ | 1,349 |
Comprehensive income (loss) attributable to Amtech Systems, Inc. | $ | (6,247 | ) |  | $ | (4,470 | ) |  | $ | (1,344 | ) |  | $ | 1,414 |
Net income (loss) per share attributable to Amtech Systems, Inc.: |  |  |  |  |  |  |
Basic earnings per share | $ | (0.53 | ) |  | $ | (0.19 | ) |  | $ | (0.12 | ) |  | $ | 0.10 |
Shares used in calculation | 9,854 |  |  | 11,997 |  |  | 13,103 |  |  | 13,150 |
Diluted earnings per share | $ | (0.53 | ) |  | $ | (0.19 | ) |  | $ | (0.12 | ) |  | $ | 0.10 |
Shares used in calculation | 9,854 |  |  | 11,997 |  |  | 13,103 |  |  | 13,259 |
Fiscal Year 2014: |
Revenue | $ | 14,772 |  |  | $ | 12,717 |  |  | $ | 9,190 |  |  | $ | 19,822 |
Gross margin | $ | 4,535 |  |  | $ | 2,898 |  |  | $ | 1,631 |  |  | $ | 2,562 |
Provision for (benefit of) for income taxes | $ | 560 |  |  | $ | — |  |  | $ | 1,325 |  |  | $ | (645 | )
Net loss attributable to Amtech Systems, Inc. | $ | (794 | ) |  | $ | (3,751 | ) |  | $ | (5,257 | ) |  | $ | (3,245 | )
Comprehensive loss attributable to Amtech Systems, Inc. | $ | (66 | ) |  | $ | (3,756 | ) |  | $ | (5,568 | ) |  | $ | (4,892 | )
Net loss per share attributable to Amtech Systems, Inc.: |  |  |  |  |  |  |
Basic earnings per share | $ | (0.08 | ) |  | $ | (0.39 | ) |  | $ | (0.53 | ) |  | $ | (0.33 | )
Shares used in calculation | 9,560 |  |  | 9,679 |  |  | 9,843 |  |  | 9,846 |
Diluted earnings per share | $ | (0.08 | ) |  | $ | (0.39 | ) |  | $ | (0.53 | ) |  | $ | (0.33 | )
Shares used in calculation | 9,560 |  |  | 9,679 |  |  | 9,843 |  |  | 9,846 |

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- Definition The entire disclosure for the quarterly financial data in the annual financial statements. The disclosure may include a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income or loss before extraordinary items and earnings per share data. It also includes an indication if the information in the note is unaudited, comments on the aggregate effect of year-end adjustments, and an explanation of matters or transactions that affect comparability or are pertinent to an understanding of the information furnished. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=51655806&loc=d3e765-108305 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=51825399&loc=d3e1280-108306 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=51655806&loc=d3e725-108305 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section G -Subsection 1 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 302 -Paragraph a + Details
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