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Net Income (Loss) Per Share (Tables) | 9 Months Ended
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Sep. 30, 2015
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, |
|  | 2015 |  | 2014 |  | 2015 |  | 2014 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) attributable to AXT, Inc |  | $ | 42 |  | $ | 644 |  | $ | (985) |  | $ | (1,077) |
Less: Preferred stock dividends |  |  | (44) |  |  | (44) |  |  | (132) |  |  | (132) |
Net income (loss) available to common stockholders |  | $ | (2) |  | $ | 600 |  | $ | (1,117) |  | $ | (1,209) |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |
Denominator for basic net income (loss) per share - weighted average common shares |  |  | 31,988 |  |  | 32,504 |  |  | 32,262 |  |  | 32,416 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock options |  |  | — |  |  | 201 |  |  | — |  |  | — |
Restricted stock awards |  |  | — |  |  | 33 |  |  | — |  |  | — |
Denominator for dilutive net income (loss) per common shares |  |  | 31,988 |  |  | 32,738 |  |  | 32,262 |  |  | 32,416 |
Net income (loss) attributable to AXT, Inc. per common share: |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | (0.00) |  | $ | 0.02 |  | $ | (0.03) |  | $ | (0.04) |
Diluted |  | $ | (0.00) |  | $ | 0.02 |  | $ | (0.03) |  | $ | (0.04) |
Options excluded from diluted net income (loss) per share as the impact is anti-dilutive |  |  | 3,037 |  |  | 2,000 |  |  | 3,037 |  |  | 2,684 |
Restricted stock excluded from diluted net income (loss) per share as the impact is anti-dilutive |  |  | 466 |  |  | 77 |  |  | 466 |  |  | 250 |

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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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