Net Loss per Share (Tables)

3 Months Ended

Mar. 31, 2015

Earnings Per Share [Abstract]

Securities not included in the net loss per common share calculations

The following shares were not included in the computation of diluted net loss per share (in thousands):

	Three Months Ended March 31,
	2015	2014
Shares issuable under Equity Incentive Plan	7,124	7,083
Shares issuable upon the conversion of warrants	75	75
Total shares excluded as anti-dilutive	7,199	7,158