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Net Income Per Share (Tables) | 6 Months Ended
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Jun. 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 |  | Six Months Ended |
|  | June 30, |  | June 30, |
|  | 2012 |  | 2011 |  | 2012 |  | 2011 |
Numerator: |  |  |  |  |  |  |  |  |
Net income attributable to AXT, Inc. |  | $ | 1,299 |  | $ | 7,062 |  | $ | 2,934 |  | $ | 11,270 |
Less: Preferred stock dividends |  | (44 | ) | (44 | ) | (88 | ) | (88 | )
Net income available to common stockholders |  | $ | 1,255 |  | $ | 7,018 |  | $ | 2,846 |  | $ | 11,182 |
Denominator: |  |  |  |  |  |  |  |  |
Denominator for basic net income per share - weighted average common shares |  | 32,138 |  | 31,831 |  | 32,086 |  | 31,775 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |
Common stock options |  | 774 |  | 1,159 |  | 838 |  | 1,241 |
Restricted stock awards |  | 32 |  | 103 |  | 57 |  | 130 |
Denominator for dilutive net income per common share |  | 32,944 |  | 33,093 |  | 32,81 |  | 33,146 |
Net income attributable to AXT, Inc. per common share: |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.04 |  | $ | 0.22 |  | $ | 0.09 |  | $ | 0.35 |
Diluted |  | $ | 0.04 |  | $ | 0.21 |  | $ | 0.09 |  | $ | 0.34 |
Options excluded from diluted net income per share as the impact is anti-dilutive |  | 997 |  | 418 |  | 907 |  | 406 |
Restricted stock excluded from diluted net income per share as the impact is anti-dilutive |  | 14 |  | 186 |  | 15 |  | 186 |

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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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