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Net Loss Per Share (Tables)
3 Months Ended
Mar. 31, 2013
Potential Common Shares Excluded from Computation of Diluted Net Loss per Share
Such potentially dilutive common share equivalents consist of the following:
 
Three Months Ended
March 31,
 
2013
 
2012
5.375% Convertible Senior Notes
702,701

 
702,701

3.75% Convertible Senior Notes
5,487,642

 
5,487,642

Unvested restricted stock units
1,071,568

 
556,888

Outstanding options
2,517,112

 
2,718,720

Outstanding warrants
62,752

 
62,752

Total dilutive common shares
9,841,775

 
9,528,703