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Unaudited Quarterly Consolidated Financial Data (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Unaudited Quarterly Consolidated Financial Data [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Revenue | $ 18,927 | $ 20,808 | $ 25,153 | $ 23,486 | $ 21,219 | $ 28,305 |  | $ 30,031 | $ 24,566 | $ 88,374 | $ 104,121 | $ 95,493
Gross Profit | 3,684 | 5,466 | 7,508 | 8,194 | 7,833 | 12,263 | [1] | 14,026 | 10,660 | 24,852 | 44,782 | 36,495
Net income attributable to AXT, Inc | $ (756) | $ 932 | $ 1,299 | $ 1,635 | $ 2,566 | $ 6,484 |  | $ 7,062 | $ 4,208 | $ 3,110 | $ 20,320 | $ 18,653
Net income attributable to AXT, Inc per share, basic (in dollars per share) | $ (0.02) | $ 0.03 | $ 0.04 | $ 0.05 | $ 0.08 | $ 0.2 |  | $ 0.22 | $ 0.13 | $ 0.09 | $ 0.63 | $ 0.6
Net income attributable to AXT, Inc per share, diluted (in dollars per share) | $ (0.02) | $ 0.03 | $ 0.04 | $ 0.05 | $ 0.08 | $ 0.19 |  | $ 0.21 | $ 0.13 | $ 0.09 | $ 0.61 | $ 0.57
[1] | Certain reclassifications have been made between cost of revenue and selling, general and administrative expenses. The reclassifications have no impact on reported total assets, stockholders' equity and net income.

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