Equity Incentive Plans - Schedule of Stock Option Plan Activity (Details) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($) $ / shares shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Shares Available for Grant, Beginning balance	4,810,271
Shares Available for Grant, Authorized	2,543,513
Shares Available for Grant, Granted	(116,060)
Shares Available for Grant, Ending balance	7,237,724
Number of Options, Beginning balance	9,931,229
Number of Options, Granted	116,060
Number of Options, Exercised	(177,413)
Number of Options, Canceled	(29,634)
Number of Options, Ending balance	9,840,242
Number Options, Options exercisable	4,800,919
Number of Options, Options vested and expected to vest	9,566,505
Weighted-Average Exercise Price, Beginning balance | $ / shares	$ 5.29
Weighted-Average Exercise Price, Granted | $ / shares	14.21
Weighted-Average Exercise Price, Exercised | $ / shares	1.14
Weighted-Average Exercise Price, Canceled | $ / shares	1.12
Weighted-Average Exercise Price, Ending balance | $ / shares	5.48
Weighted-Average Exercise Price, Options exercisable | $ / shares	1.88
Weighted-Average Exercise Price, Options vested and expected to vest | $ / shares	$ 5.36
Aggregate Intrinsic Value, Beginning balance | $	$ 229,591
Aggregate Intrinsic Value, Ending balance | $	93,560
Aggregate Intrinsic Value, Options exercisable | $	54,073
Aggregate Intrinsic Value, Options vested and expected to vest | $	$ 91,553