Reconciliation of Weighted Average Shares Outstanding for Calculating Basic and Diluted Earnings Per Share | The calculations of basic and diluted net (loss) income per share and basic and diluted weighted average shares outstanding are as follows for the fiscal years ended September 30, 2016, 2015 and 2014 (in thousands, except per share data): | | | | | | | | | | | | | | Year Ended September 30, | | 2016 | | 2015 | | 2014 | (Loss) income from continuing operations | $ | (69,476 | ) | | $ | 14,221 |
| | $ | 1,520 |
| Income from discontinued operations, net of tax | — |
| | — |
| | 30,002 |
| Net (loss) income | (69,476 | ) | | 14,221 |
| | 31,522 |
| Net income attributable to noncontrolling interests | — |
| | — |
| | (161 | ) | Net (loss) income attributable to Brooks Automation, Inc. | $ | (69,476 | ) | | $ | 14,221 |
| | $ | 31,361 |
| | | | | | | Weighted average common shares outstanding used in computing basic earnings per share | 68,507 |
| | 67,411 |
| | 66,648 |
| Dilutive common stock options and restricted stock units | — |
| | 1,138 |
| | 996 |
| Weighted average common shares outstanding used in computing diluted earnings per share | 68,507 |
| | 68,549 |
| | 67,644 |
| | | | | | | Basic net (loss) income per share attributable to Brooks Automation, Inc. common stockholders: | | | | | | (Loss) income from continuing operations | $ | (1.01 | ) | | $ | 0.21 |
| | $ | 0.02 |
| Income from discontinued operations, net of tax | — |
| | — |
| | 0.45 |
| Basic net (loss) income per share attributable to Brooks Automation, Inc. | $ | (1.01 | ) | | $ | 0.21 |
| | $ | 0.47 |
| | | | | | | Diluted net (loss) income per share attributable to Brooks Automation, Inc. common stockholders: | | | | | | (Loss) income from continuing operations | $ | (1.01 | ) | | $ | 0.21 |
| | $ | 0.02 |
| Income from discontinued operations, net of tax | — |
| | — |
| | 0.44 |
| Diluted net (loss) income per share attributable to Brooks Automation, Inc. common stockholders | $ | (1.01 | ) | | $ | 0.21 |
| | $ | 0.46 |
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