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Net Income (Loss) Per Share | 3 Months Ended
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Sep. 30, 2018
Earnings Per Share [Abstract] |
Net Income (Loss) Per Share | Net Income Per Common Share Attributable to Alpha and Omega Semiconductor Limited The following table presents the calculation of basic and diluted net income per share attributable to common shareholders:
| Three Months Ended September 30,
| 2018 |  | 2017
| (in thousands, except per share data)
Numerator: |  |  |
Net income attributable to Alpha and Omega Semiconductor Limited | $ | 2,416 |  |  | $ | 4,800 |
Denominator: |  |  |
Basic: |  |  |
Weighted average number of common shares used to compute basic net income per share | 23,844 |  |  | 24,021 |
Diluted: |  |  |
Weighted average number of common shares used to compute basic net income per share | 23,844 |  |  | 24,021 |
Effect of potentially dilutive securities: |  |  |
Stock options, RSUs and ESPP shares | 750 |  |  | 939 |
Weighted average number of common shares used to compute diluted net income per share | 24,594 |  |  | 24,960 |
Net income per share attributable to Alpha and Omega Semiconductor Limited: |  |  |
Basic | $ | 0.10 |  |  | $ | 0.20 |
Diluted | $ | 0.10 |  |  | $ | 0.19 |
The following potential dilutive securities were excluded from the computation of diluted net income per share as their effect would have been anti-dilutive:
| Three Months Ended September 30,
| 2018 |  | 2017
| (in thousands)
Employee stock options and RSUs | 405 |  |  | 172 |
ESPP | 216 |  |  | 90 |
Total potential dilutive securities | 621 |  |  | 262 |

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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