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Note G - Earnings per Share Data
 6 Months Ended
Jun. 30, 2012
Earnings Per Share [Text Block]
Note G:                      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.  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, 2012 and 2011.

   
Three Months Ended
June 30,
   
Six Months Ended
June 30,
 
   
2012
   
2011
   
2012
   
2011
 
Basic weighted-average shares
    23,107       24,269       23,349       24,242  
Conversion of unsecured loan notes
    7       7       7       7  
Unexercised options and RSUs
    870       633       766       651  
Diluted weighted-average shares
    23,984       24,909       24,122       24,900  

At June 30, 2012, Fuel Tech had 1,547,000 weighted average stock awards outstanding that were not dilutive for the purpose of inclusion in the calculation of diluted earnings per share but could potentially become dilutive in future periods.