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Net Income (loss) Per Share (Tables) | 9 Months Ended
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Sep. 30, 2013
Net Income (loss) Per Share [Abstract] |
Reconciliation of numerators and denominators of basic and diluted net income (loss) per share | A reconciliation of the numerators and denominators of the basic and diluted net income (loss) per share calculations is as follows (in thousands, except per share data):
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, |  |  | September 30, |
|  | 2013 |  |  | 2012 |  |  | 2013 |  |  | 2012 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) attributable to AXT, Inc. |  | $ | (2,295 | ) |  | $ | 932 |  |  | $ | (6,730 | ) |  | $ | 3,866 |
Less: Preferred stock dividends |  |  | (44 | ) |  |  | (44 | ) |  |  | (132 | ) |  |  | (132 | )
Net income (loss) available to common stockholders |  | $ | (2,339 | ) |  | $ | 888 |  |  | $ | (6,862 | ) |  | $ | 3,734 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average common shares (basic) |  |  | 32,366 |  |  |  | 32,183 |  |  |  | 32,407 |  |  |  | 32,118 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock options |  |  | — |  |  |  | 582 |  |  |  | — |  |  |  | 754 |
Restricted stock awards |  |  | — |  |  |  | 4 |  |  |  | — |  |  |  | 39 |
Weighted average common shares (dilutive) |  |  | 32,366 |  |  |  | 32,769 |  |  |  | 32,407 |  |  |  | 32,911 |
Net income (loss) attributable to AXT, Inc. per common share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | (0.07 | ) |  | $ | 0.03 |  |  | $ | (0.21 | ) |  | $ | 0.12 |
Diluted |  | $ | (0.07 | ) |  | $ | 0.03 |  |  | $ | (0.21 | ) |  | $ | 0.11 |
Options excluded from diluted net income (loss) per share as the impact is anti-dilutive |  |  | 2,524 |  |  |  | 992 |  |  |  | 2,563 |  |  |  | 977 |
Restricted stock excluded from diluted net income (loss) per share as the impact is anti-dilutive |  |  | 243 |  |  |  | 172 |  |  |  | 242 |  |  |  | 14 |

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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://www.xbrl.org/2003/role/presentationRef -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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