Net Loss per Share (Tables)

3 Months Ended

Mar. 31, 2016

Earnings Per Share [Abstract]

Securities not included in the net loss per common share calculations

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

	Three Months Ended March 31,
	2016	2015
Shares issuable under Equity Incentive Plan	6,577	7,124
Shares issuable upon the conversion of warrants	73	75
Total shares excluded as anti-dilutive	6,650	7,199