Preferred Stock and Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2016

Equity [Abstract]

Summary of Common Stock Reserved for Future Issuance

ommon stock reserved for future issuance is as follows (in thousands):

	December 31,
	2016	2015
Stock options and restricted stock units outstanding	3,388	2,714
Warrants to purchase common stock	1,975	1,975
Shares authorized for future issuance under equity and purchase plans	952	678
	6,315	5,367