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Net Loss Per Share
 9 Months Ended
Sep. 30, 2014
Net Loss Per Share [Abstract]  
Net Loss Per Share
4.  Net Income (Loss) Per Share

Our basic net income (loss) per share amounts have been computed by dividing net income (loss) by the weighted-average number of common shares outstanding during the period. For the current reporting periods, we reported net income, and the computation of diluted earnings per share is based upon the weighted-average number of our common shares and dilutive effect of stock options (determined using the treasury stock method) and  contingent consideration liability (arising from our 2013 acquisition of Molecular Insight). For the corresponding periods of 2013, we reported net losses, and therefore potential dilutive common shares were not included in the computation of diluted net loss per share since it would have been anti-dilutive. The calculations of net income (loss) per share, basic and diluted, are as follows:

  
Net Income (Loss)
 (Numerator)
  
Weighted Average Common Shares
 (Denominator)
(in thousands)
  
Per Share
 Amount
 
Three months ended September 30, 2014
      
Basic
 
$
36,975
   
69,556
  
$
0.53
 
  Dilutive effect of contingent consideration liability
  
500
   
3,295
     
  Dilutive effect of stock options
  
-
   
28
     
Diluted
 
$
37,475
   
72,879
  
$
0.51
 
Nine months ended September 30, 2014
            
Basic
 
$
16,589
   
67,712
  
$
0.24
 
  Dilutive effect of contingent consideration liability
  
-
   
-
     
  Dilutive effect of stock options
  
-
   
15
     
Diluted
 
$
16,589
   
67,727
  
$
0.24
 
Three months ended September 30, 2013
            
Basic and diluted
 
$
(10,500
)
  
60,599
  
$
(0.17
)
Nine months ended September 30, 2013
            
Basic and diluted
 
$
(34,021
)
  
54,104
  
$
(0.63
)
 
For these periods, anti-dilutive common shares excluded from diluted per share amounts consist of the following:

  
Three Months Ended September 30,
 
  
2014
  
2013
 
  
Weighted
Average
 Number
(in thousands)
  
Weighted
Average
 Exercise Price
  
Weighted
Average
 Number
(in thousands)
  
Weighted
Average
 Exercise Price
 
Options
  
5,267
  
$
10.23
   
6,068
  
$
11.14
 

  
Nine Months Ended September 30,
 
  
2014
  
2013
 
  
Weighted
Average
 Number
(in thousands)
  
Weighted
Average
 Exercise Price
  
Weighted
Average
 Number
(in thousands)
  
Weighted
Average
 Exercise Price
 
Options
  
5,357
  
$
10.31
   
6,047
  
$
11.69
 
Contingent consideration liability
  
3,295
       
-
     
Total
  
8,652
       
6,047