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(Loss) Income Per Share (Tables)
 6 Months Ended
Jun. 30, 2013
Loss Per Share [Abstract]  
Reconciliation of basic net income (loss) per share to diluted net income (loss) per share
The following is a reconciliation of basic (loss) income per share to diluted net loss per share for the three and six months ended June 30, 2013 and 2012:

 
 
Three Months Ended
June 30,
(Unaudited)
  
Six Months Ended
June 30,
(Unaudited)
 
(Amounts in Thousands, Except for Per Share Amounts)
 
2013
  
2012
  
2013
  
2012
 
Loss per share from continuing operations attributable to Perma-Fix Environmental Services, Inc.common stockholders
            
Loss from continuing operations
 
$
(980
)
 
$
(1,009
)
 
$
(3,868
)
 
$
(1,816
)
Basic loss per share
 
$
(.02
)
 
$
(.02
)
 
$
(.07
)
 
$
(.04
)
Diluted loss per share
 
$
(.02
)
 
$
(.02
)
 
$
(.07
)
 
$
(.04
)
 
                
Income (loss) per share from discontinued operations attributable to Perma-Fix Environemental Services, Inc. common stockholders
                
Income (loss) from discontinued operations
 
$
43
  
$
(60
)
 
$
15
  
$
(198
)
Basic income (loss) per share
 
$
¾
  
$
¾
  
$
¾
  
$
¾
 
Diluted income (loss) per share
 
$
¾
  
$
¾
  
$
¾
  
$
¾
 
 
                
Weighted average common shares outstanding – basic
  
56,334
   
56,094
   
56,303
   
56,078
 
Potential shares exercisable under stock option plans
  
¾
   
¾
   
¾
   
¾
 
Weighted average shares outstanding – diluted
  
56,334
   
56,094
   
56,303
   
56,078
 
 
                
                 
Potential shares excluded from above weighted average share calculations due to their anti-dilutive effect include:
                
Upon exercise of stock options
  
1,954
   
2,614
   
1,954
   
2,124