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Net Income Per Share (Tables) | 9 Months Ended
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Sep. 30, 2012
Net Income Per Share [Abstract] |
Reconciliation of Numerator and Denominator in Income Per Share | A reconciliation of the numerators and denominators of the basic and diluted net income per share calculations is as follows (in thousands, except per share data):
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, |  |  | September 30, |
|  | 2012 |  |  | 2011 |  |  | 2012 |  |  | 2011 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to AXT, Inc. |  | $ | 932 |  |  | $ | 6,484 |  |  | $ | 3,866 |  |  | $ | 17,754 |
Less: Preferred stock dividends |  |  | (44 | ) |  |  | (44 | ) |  |  | (132 | ) |  |  | (132 | )
Net income available to common stockholders |  | $ | 888 |  |  | $ | 6,440 |  |  | $ | 3,734 |  |  | $ | 17,622 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Denominator for basic net income per share - weighted average common shares |  |  | 32,183 |  |  |  | 31,944 |  |  |  | 32,118 |  |  |  | 31,832 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock options |  |  | 582 |  |  |  | 1,094 |  |  |  | 754 |  |  |  | 1,192 |
Restricted stock awards |  |  | 4 |  |  |  | 88 |  |  |  | 39 |  |  |  | 116 |
Denominator for dilutive net income per common share |  |  | 32,769 |  |  |  | 33,126 |  |  |  | 32,911 |  |  |  | 33,140 |
Net income attributable to AXT, Inc. per common share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.03 |  |  | $ | 0.20 |  |  | $ | 0.12 |  |  | $ | 0.55 |
Diluted |  | $ | 0.03 |  |  | $ | 0.19 |  |  | $ | 0.11 |  |  | $ | 0.53 |
Options excluded from diluted net income per share as the impact is anti-dilutive |  |  | 992 |  |  |  | 407 |  |  |  | 977 |  |  |  | 403 |
Restricted stock excluded from diluted net income per share as the impact is anti-dilutive |  |  | 172 |  |  |  | 163 |  |  |  | 14 |  |  |  | 163 |

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- Definition Tabular disclosure of the numerators and the denominators of the basic and diluted per-share (or per-unit) computations for income from continuing operations, including the effect that has been given to preferred dividends. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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