Net Income (Loss) per Share (Tables)

12 Months Ended

Dec. 31, 2016

Earnings Per Share [Abstract]

Schedule of common stock equivalents excluded due to anti-dilutive effect

	Year Ended December 31,
	2014	2015	2016
Outstanding common stock options	5,096,674	5,686,815	6,447,594
Outstanding warrants	34,647	34,647	34,647
Outstanding PRSUs	245,396	213,758	—
Outstanding RSUs	161,439	351,414	394,132
Shares to be purchased under the ESPP	2,894	4,236	4,394
Total	5,541,050	6,290,870	6,880,767

Schedule of dilutive shares included in determination of weighted average shares outstanding

	Year Ended
	December 31,
	2014
Outstanding common stock options	1,494,796
Outstanding warrants	5,433
Outstanding RSUs	14,128
Shares to be purchased under the ESPP	1,392
Total	1,515,749