Stock Options - Non-Employee Stock Option/Warrant Activity (Detail) - Stock Options And Warrants	9 Months Ended
	Sep. 30, 2015 $ / shares shares
Option/Warrant Shares
Outstanding, beginning balance | shares	1,425,481
Granted | shares	0
Exercised | shares	(45,882)
Expired | shares	0
Outstanding, ending balance | shares	1,379,599
Exercisable, September 30, 2015 | shares	1,379,599
Weighted Average Remaining Life, Exercisable, September 30, 2015 (years)	5 years
Weighted Average Exercise Price
Outstanding, beginning balance	$ 8.50
Granted	0
Exercised	0
Expired	0
Outstanding, ending balance	9.11
Exercisable, September 30, 2015	9.11
Minimum
Exercise Price
Outstanding, beginning balance	0.85
Granted	0
Exercised	0.85
Expired	0
Outstanding, ending balance	0.85
Exercisable, September 30, 2015	0.85
Maximum
Exercise Price
Outstanding, beginning balance	17.00
Granted	0
Exercised	4.25
Expired	0
Outstanding, ending balance	12.75
Exercisable, September 30, 2015	$ 12.75