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Selected Quarterly Data (Unaudited) (Tables) | 12 Months Ended
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Sep. 30, 2017
Selected Quarterly Data (Unaudited) [Abstract] |
Selected Quarterly Data (Unaudited) |
| First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter
Fiscal Year 2017: | (in thousands, except per share amounts)
Revenue | $ | 29,135 |  |  | $ | 32,944 |  |  | $ | 47,760 |  |  | $ | 54,677 |
Gross profit | $ | 8,443 |  |  | $ | 8,395 |  |  | $ | 15,502 |  |  | $ | 19,592 |
Provision for income taxes | $ | 90 |  |  | $ | 194 |  |  | $ | 986 |  |  | $ | 474 |
Net income (loss) attributable to Amtech Systems, Inc. | $ | (53 | ) |  | $ | (1,420 | ) |  | $ | 3,287 |  |  | $ | 7,317 |
Net income (loss) per share attributable to Amtech Systems, Inc.: |  |  |  |  |  |  |
Basic earnings per share | $ | 0.00 |  |  | $ | (0.11 | ) |  | $ | 0.25 |  |  | $ | 0.53 |
Shares used in calculation | 13,179 |  |  | 13,188 |  |  | 13,242 |  |  | 13,895 |
Diluted earnings per share | $ | 0.00 |  |  | $ | (0.11 | ) |  | $ | 0.25 |  |  | $ | 0.51 |
Shares used in calculation | 13,179 |  |  | 13,188 |  |  | 13,398 |  |  | 14,294 |
Fiscal Year 2016: |
Revenue | $ | 22,074 |  |  | $ | 22,483 |  |  | $ | 33,342 |  |  | $ | 42,409 |
Gross profit | $ | 5,955 |  |  | $ | 6,001 |  |  | $ | 9,631 |  |  | $ | 12,476 |
Provision for income taxes | $ | 300 |  |  | $ | 1,670 |  |  | $ | 70 |  |  | $ | 1,060 |
Net loss attributable to Amtech Systems, Inc. | $ | (4,015 | ) |  | $ | (1,499 | ) |  | $ | (1,209 | ) |  | $ | (285 | )
Net loss per share attributable to Amtech Systems, Inc.: |  |  |  |  |  |  |
Basic loss per share | $ | (0.31 | ) |  | $ | (0.11 | ) |  | $ | (0.09 | ) |  | $ | (0.02 | )
Shares used in calculation | 13,152 |  |  | 13,169 |  |  | 13,173 |  |  | 13,177 |
Diluted loss per share | $ | (0.31 | ) |  | $ | (0.11 | ) |  | $ | (0.09 | ) |  | $ | (0.02 | )
Shares used in calculation | 13,152 |  |  | 13,169 |  |  | 13,173 |  |  | 13,177 |

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: 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=84173487&loc=d3e1280-108306 + Details
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