Subsequent Events - Additional Information (Detail) (USD $)	1 Months Ended			1 Months Ended
	Jun. 25, 2013	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 Subsequent Events [Member]
Subsequent Event [Line Items]
Initial public offering, shares sold	5,400,000			5,400,000
Common stock price per share	$ 10.00	$ 0.0001	$ 0.0001	$ 10.00
Proceeds from the initial public offering	$ 50,200,000			$ 50,200,000
Deferred offering costs		$ 3,384,000	$ 1,765,000
Number of shares of common stock issued by conversion of warrants				617,605
Weighted average exercise price of stock issued by conversion				$ 8.78