Property and Equipment, Net, and Other Assets - Components of Property and Equipment, Net, and Other Assets (Detail) - USD ($)	Jun. 30, 2017	Dec. 31, 2016
Property Plant And Equipment [Abstract]
Property and equipment, net of accumulated depreciation of $2,588,002 and $2,442,549 as of June 30, 2017 and December 31, 2016, respectively	$ 1,148,089	$ 1,340,850
Security deposits and other assets	708,232	1,074,071
Property and Equipment net and other assets	$ 1,856,321	$ 2,414,921