Stockholders' Equity - Schedule of Stock Option Activity (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Number of Options Outstanding, Beginning	1,967
Options granted	431
Options exercised	(40)
Options canceled	(24)
Number of Options Outstanding, Ending	2,334	1,967
Number of Options Outstanding, Vested and expected to vest	2,054
Number of Options Outstanding, Exercisable	930
Weighted-Average Exercise Price, Beginning	$ 15.22
Weighted-Average Exercise Price, Options granted	$ 26.05
Weighted-Average Exercise Price, Options exercised	$ 7.56
Weighted-Average Exercise Price, Options canceled	$ 16.35
Weighted-Average Exercise Price, Ending	$ 17.33	$ 15.22
Weighted-Average Exercise Price, Vested and expected to vest	$ 16.82
Weighted-Average Exercise Price, Exercisable	$ 11.72
Weighted-Average Remaining Contractual Term (In Years)	8 years 2 months 12 days	8 years
Weighted-Average Remaining Contractual Term (In Years), Vested and expected to vest	8 years 1 month 6 days
Weighted-Average Remaining Contractual Term (In Years), Exercisable	6 years 10 months 24 days
Aggregate Intrinsic Value	$ 22,918	$ 26,168
Aggregate Intrinsic Value, Vested and expected to vest	22,132
Aggregate Intrinsic Value, Exercisable	$ 14,235