Significant Accounting Policies - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified			0 Months Ended		0 Months Ended		0 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Feb. 11, 2014 Initial Public Offering ("IPO") [Member]	Feb. 11, 2014 Initial Public Offering ("IPO") [Member]	Feb. 11, 2014 Initial Public Offering ("IPO") [Member] Common Stock [Member]	Feb. 11, 2014 Initial Public Offering ("IPO") [Member] Common Stock [Member]	Feb. 11, 2014 Initial Public Offering ("IPO") [Member] Underwriter [Member]	Jan. 21, 2014 Reverse Stock Split [Member]
Accounting Policies [Line Items]
Issuance of common stock			5,750,000				750,000
Share offering price				$ 10.00
Proceeds from issuance of common stock			$ 50.2
Stock issued related to conversion of preferred stock					8,260,444
Shares of common stock into which warrants are exercisable						30,708
Common stock, shares authorized	200,000,000	77,688,009		200,000,000
Preference stock, shares authorized	5,000,000	0		5,000,000
Reverse stock split ratio								0.1575