Net Loss per Share (Tables)

6 Months Ended

Jun. 30, 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 June 30,		Six Months Ended June 30,
	2015	2014	2015	2014
Shares issuable under Equity Incentive Plan	6,595	7,114	6,595	7,114
Shares issuable upon the conversion of warrants	75	75	75	75
Total shares excluded as anti-dilutive	6,670	7,189	6,670	7,189