Warrants - Summary of Warrant Activity (Detail) - $ / shares		9 Months Ended	12 Months Ended
	Mar. 23, 2015	Sep. 30, 2015	Dec. 31, 2014
Equity [Abstract]
Warrants, Beginning balance		2,532,094	2,747,094
Warrants, Granted		0	0
Warrants, Exercised		(185,585)	(210,000)
Warrants, Expired	(2,170,925)	(2,170,925)	(5,000)
Warrants, Ending balance		175,584	2,532,094
Weighted Average Price, Beginning balance		$ 1.93	$ 1.91
Weighted Average Price, Granted		0	0
Weighted Average Price, Exercised		1.50	1.50
Weighted Average Price, Expired	$ (2.00)	(2.00)	(10.00)
Weighted Average Price, Ending balance		$ 1.50	$ 1.93