Property and Equipment - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Property Plant And Equipment [Abstract]
Depreciation and amortization	$ 250,969	$ 48,117	$ 402,910	$ 76,325
Net book value of assets under capital leases	70,150		70,150		$ 77,958
Accumulated depreciation	$ 16,750		$ 16,750		$ 18,071