Stockholders' Equity - Additional Information (Detail) (USD $)	3 Months Ended		0 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Apr. 04, 2014 Subsequent Event IPO	Apr. 04, 2014 Subsequent Event IPO Underwriting discounts and commissions	Apr. 04, 2014 Subsequent Event IPO Other Offering Costs	Apr. 04, 2014 Common stock Subsequent Event	Mar. 31, 2014 Series A preferred stock
Class of Stock [Line Items]
Number of common shares issued upon conversion of preferred stock							1
Issuance of common stock related to IPO			4,000,000			4,000,000
Issuance of common stock price per share related to IPO			$ 26.00			$ 26.00
Net proceeds from IPO			$ 95,500,000
Offering expenses				6,500,000	2,000,000
Common stock, shares authorized	500,000,000	165,000,000
Common stock, shares issued	54,083,204	53,757,437
Common stock, shares outstanding	54,083,204	53,757,437
Treasury stock, shares	0	0
Series A Convertible Preferred Stock, liquidation preference	86,200,000	86,200,000
Aggregate shares of common stock that convertible Series A preferred stock automatically converted into						19,284,113
Shares of common stock that would require the Company to repurchase these shares at fair value determined at the redemption date	1,344,236	1,344,236
Fair value of redeemable common stock	35,000,000	18,400,000
Annual redemption limit	$ 4,000,000
Initial public offering closing date	Apr. 04, 2014