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Net Income (Loss) Per Share (Tables) | 12 Months Ended
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Jun. 30, 2019
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted | The following table presents the calculation of basic and diluted net income per share attributable to common shareholders:
| Year Ended June 30,
| 2019 |  | 2018 |  | 2017
| (in thousands, except per share data)
Numerator: |  |  |  |  |
Net income attributable to Alpha and Omega Semiconductor Limited | $ | 1,861 |  |  | $ | 14,263 |  |  | $ | 13,829 |
Denominator: |  |  |  |  |
Basic: |  |  |  |  |
Weighted average number of common shares used to compute basic net income per share | 24,063 |  |  | 23,901 |  |  | 23,526 |
Diluted: |  |  |  |  |
Weighted average number of common shares used to compute basic net income per share | 24,063 |  |  | 23,901 |  |  | 23,526 |
Effect of potentially dilutive securities: |  |  |  |  |
Stock options, RSUs and ESPP shares | 635 |  |  | 943 |  |  | 1,300 |
Weighted average number of common shares used to compute diluted net income per share | 24,698 |  |  | 24,844 |  |  | 24,826 |
Net income per share attributable to Alpha and Omega Semiconductor Limited: |  |  |  |  |
Basic | $ | 0.08 |  |  | $ | 0.60 |  |  | $ | 0.59 |
Diluted | $ | 0.08 |  |  | $ | 0.57 |  |  | $ | 0.56 |
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share | The following potential dilutive securities were excluded from the computation of diluted net income per share as their effect would have been anti-dilutive:
| Year Ended June 30,
| 2019 |  | 2018 |  | 2017
| (in thousands)
Employee stock options and RSUs | 593 |  |  | 186 |  |  | 105 |
ESPP | 512 |  |  | 182 |  |  | 19 |
Total potential dilutive securities | 1,105 |  |  | 368 |  |  | 124 |

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + 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 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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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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