Organization and Basis of Presentation - Additional Information (Detail) (USD $)	0 Months Ended	12 Months Ended		0 Months Ended	12 Months Ended				12 Months Ended				0 Months Ended
	Jun. 13, 2013	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2013 IPO [Member]	Dec. 31, 2013 IPO [Member]	Dec. 31, 2013 IPO [Member] Retention bonus expense [Member]	Dec. 31, 2013 IPO [Member] Warrants for common stock [Member]	Dec. 31, 2013 IPO [Member] Warrants for Convertible Preferred Stock [Member]	Dec. 31, 2013 IPO [Member] Warrants for common stock converted from warrants for preferred stock [Member]	Dec. 31, 2013 IPO [Member] Executive Officers [Member] Retention bonus expense [Member]	Dec. 31, 2013 IPO [Member] Executive Officers [Member] Catch-up retention bonus expense [Member]	Dec. 31, 2013 IPO [Member] Underwriters and Affiliates [Member] Warrants for common stock [Member]	Oct. 08, 2013 Over-allotment option exercise [Member] Underwriters [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Date of Incorporation		Jan. 29, 2007
Deficit accumulated during the development stage		$ 22,691,468	$ 19,855,003
Working capital (deficit)		22,146,047	(454,396)
Reverse stock split of issued and outstanding shares	One-for-five
Reverse stock split effective date		Aug. 30, 2013
Common stock shares sold				2,100,000									315,000
Common stock shares price per share				$ 12.00									$ 12.00
Conversion of convertible preferred stock					2,439,002
Retention bonus payable to executive officers										355,000	202,857
Retention bonuses accounting treatment						Such amount was recorded as expense on a straight-line basis from May 22, 2013 (the date of the retention agreements entered into with the executive officers) through December 24, 2013, the date at which the final payment was due based on continued employment.
Number of shares callable by warrants								110,000	22,000			84,000
Warrants exercise price per share							21.00
Warrants exercisable start date							Sep. 24, 2014
Warrants expiration date		Jun. 01, 2022					Sep. 24, 2018
Initial fair value of warrants							470,000
Warrant liability to additional paid-in capital		$ 187,000							$ 187,000
Common stock authorized		50,000,000	20,000,000
Preferred stock authorized		5,000,000	0