Schedule of Fair Value, Valuation Techniques and Related Unobservable Inputs (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2014		Dec. 31, 2013
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Redeemable common stock	$ 34,950		$ 18,415
Valuation Technique	Probability Weighted Expected Return Method
Discount rate			15.30%
Lack of marketability per common share			14.90%
Level 3 | Estimate of Fair Value Measurement
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Redeemable common stock	$ 34,950	[1]	$ 18,415

[1] There was no lack of marketability or discount rate applied in the calculation of the fair value of the Company's redeemable common stock as of March 31, 2014 given the IPO in April of 2014.