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Note I - Earnings per Share Data
3 Months Ended
Mar. 31, 2013
Earnings Per Share [Text Block]
Note I:                      Earnings per Share Data

Basic earnings per share excludes the dilutive effects of stock options, restricted stock units (RSUs), and the nil coupon non-redeemable convertible unsecured loan notes.  Diluted earnings per share includes the dilutive effect of stock options, restricted stock units, and of the nil coupon non-redeemable convertible unsecured loan notes.  At March 31, 2013, basic earnings per share is equal to diluted earnings per share because all outstanding stock awards and convertible loan notes are considered anti-dilutive during periods of net loss.  Fuel Tech had 2,516,000 and 1,428,000 weighted average stock awards outstanding at March 31, 2013 and 2012, 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.  The following table sets forth the weighted-average shares used in calculating the earnings per share for the three-month periods ended March 31, 2013 and 2012.

   
Three Months Ended
March 31:
 
   
2013
   
2012
 
Basic weighted-average shares
    22,112,000       23,591,000  
Conversion of unsecured loan notes
    -       7,000  
Unexercised options
    -       118,000  
Unvested restricted stock units
    -       545,000  
Diluted weighted-average shares
    22,112,000       24,261,000