Net Loss per Share (Tables)

12 Months Ended

Dec. 31, 2018

Earnings Per Share [Abstract]

Shares not included in computation of diluted net loss per share

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

	Year Ended December 31,
	2018	2017	2016
Shares issuable under Equity Incentive Plan	6,339	6,882	5,567
Shares issuable upon the conversion of warrants	—	—	73
Total anti-dilutive securities	6,339	6,882	5,640