Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2016

Accounting Policies [Abstract]

Potential common shares excluded from the computation of diluted net loss per share

The following outstanding securities were excluded from the computation of diluted net loss per share attributable to our common stockholders as their inclusion would have been anti-dilutive:

	As of March 31,
	2016	2015
	(in thousands)
Outstanding restricted stock units	969	214
Outstanding stock options	3,017	3,492
Outstanding common stock warrants	1,214	1,248
Outstanding employee stock purchase plan units	—	—
Total excluded securities	5,200	4,954