Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended	6 Months Ended
	Feb. 29, 2016	Jun. 30, 2016	Dec. 31, 2015
Accounting Policies [Abstract]
Deferred offering costs			$ 2,744
Payment of offering costs		$ 3,971
Number of common shares issued on conversion of convertible preferred stock	9,699,600