Net Loss Per Share (Tables)

3 Months Ended

Mar. 31, 2015

Disclosure Potential Common Shares Excluded From Computation Of Diluted Net Loss Per Share [Abstract]

Potential Common Shares Excluded from Computation of Diluted Net Loss per Share

Potential dilutive common share equivalents consist of the following:

	Three Months Ended March 31,
	2015	2014
3.75% Convertible Senior Notes	—	5,487,642
2.00% Convertible Senior Notes	4,327,257	—
Unvested restricted stock units	961,947	1,024,695
Outstanding options	2,769,259	1,722,082
Total dilutive common shares	8,058,463	8,234,419