Property and Equipment, Net, and Other Assets - Components of Property and Equipment, Net, and Other Assets (Detail) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 3,281,774	$ 2,226,672
Accumulated depreciation	(1,973,538)	(1,692,835)
Property and equipment, net	1,308,236	533,837
Security deposits and other assets	300,396	219,656
Property and Equipment net and other assets	1,608,632	753,493
Vehicles [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	544,984	544,984
Computer equipment [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	946,929	793,109
Office furniture and fixtures [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	634,547	329,210
Machinery and equipment [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	514,041	458,257
Leasehold improvements [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 641,273	$ 101,112