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Net Income per Share (Tables) | 6 Months Ended
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Nov. 30, 2018
Calculation of Net Income Per Share | The calculation of net income per share attributable to Neogen Corporation follows:
|  | Three Months Ended |  |  | Six Months Ended |
|  | November 30, |  |  | November 30, |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
|  | (in thousands, except per share amounts) |
Numerator for basic and diluted net income per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to Neogen |  | $ | 16,051 |  |  | $ | 17,100 |  |  | $ | 31,288 |  |  | $ | 29,014 |
Denominator for basic net income per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average shares |  |  | 52,019 |  |  |  | 51,264 |  |  |  | 51,820 |  |  |  | 51,109 |
Effect of dilutive stock options |  |  | 572 |  |  |  | 697 |  |  |  | 721 |  |  |  | 669 |
Denominator for diluted net income per share |  |  | 52,591 |  |  |  | 51,961 |  |  |  | 52,541 |  |  |  | 51,778 |
Net income attributable to Neogen per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.31 |  |  | $ | 0.33 |  |  | $ | 0.60 |  |  | $ | 0.57 |
Diluted |  | $ | 0.31 |  |  | $ | 0.33 |  |  | $ | 0.60 |  |  | $ | 0.56 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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Namespace Prefix: | us-gaap_
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Period Type: | duration