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Earnings per Share Data (Tables) | 6 Months Ended
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Jun. 30, 2014
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted | The following table sets forth the weighted-average shares used in calculating the earnings per share for the three and six- month periods ended June 30, 2014 and 2013.
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
|  | 2014 |  | 2013 |  | 2014 |  | 2013
Basic weighted-average shares |  | 22,814,000 |  |  | 22,197,000 |  |  | 22,728,000 |  |  | 22,155,000 |
Conversion of unsecured loan notes |  | — |  |  | 7,000 |  |  | — |  |  | 7,000 |
Unexercised options and unvested RSUs |  | — |  |  | 1,091,000 |  |  | — |  |  | 971,000 |
Diluted weighted-average shares |  | 22,814,000 |  |  | 23,295,000 |  |  | 22,728,000 |  |  | 23,133,000 |
Fuel Tech had 1,434,000 and 1,658,000 weighted average equity awards outstanding at June 30, 2014 and 2013, respectively, that were not dilutive for the purposes of inclusion in the calculation of diluted earnings per share but could potentially become dilutive in future periods.

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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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