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Loss Per Share (Tables)
 9 Months Ended
Sep. 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 per share to diluted net loss per share for the three and nine months ended September 30, 2013 and 2012:

 
 
Three Months Ended
  
Nine Months Ended
 
 
 
September 30,
  
September 30,
 
 
 
(Unaudited)
  
(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
 
$
(568
)
 
$
(493
)
 
$
(4,372
)
 
$
(2,467
)
Basic loss per share
 
$
(.05
)
 
$
(.04
)
 
$
(.39
)
 
$
(.22
)
Diluted loss per share
 
$
(.05
)
 
$
(.04
)
 
$
(.39
)
 
$
(.22
)
 
                
Loss per share from discontinued operations attributable to Perma-Fix Environemental Services, Inc. common stockholders
                
Loss from discontinued operations
 
$
(240
)
 
$
(61
)
 
$
(224
)
 
$
(259
)
Basic loss per share
 
$
(.02
)
 
$
(.01
)
 
$
(.02
)
 
$
(.02
)
Diluted loss per share
 
$
(.02
)
 
$
(.01
)
 
$
(.02
)
 
$
(.02
)
 
                
Weighted average common shares outstanding – basic
  
11,353
   
11,228
   
11,292
   
11,220
 
Potential shares exercisable under stock option plans
  
―
   
―
   
―
   
―
 
Potential shares upon exercise of Warrants
  
―
   
―
   
―
   
―
 
Weighted average shares outstanding – diluted
  
11,353
   
11,228
   
11,292
   
11,220
 
 
                
 
Potential shares excluded from above weighted average share calculations due to their anti-dilutive effect include:
                
 
                
Upon exercise of stock options
  
391
   
535
   
373
   
523
 
Upon exercise of Warrants
  
―
   
―
   
―
   
―