Share Based Compensation - Summary of Stock Option Activity (Detail)	3 Months Ended
	Mar. 31, 2016 USD ($) $ / shares shares
Stockholders Equity Note [Abstract]
Number of Shares Outstanding, Beginning | shares	9,480,497
Number of Shares Granted | shares	402,000
Number of Shares Cancelled/Forfeited | shares	(792,998)
Number of Shares Outstanding, Ending | shares	9,089,499
Number of Shares Exercisable, Ending | shares	6,864,944
Weighted Average Exercise Price Outstanding, Beginning Balance | $ / shares	$ 2.19
Weighted Average Exercise Price Granted/Issued | $ / shares	0.92
Weighted Average Exercise Price Cancelled/Forfeited | $ / shares	1.80
Weighted Average Exercise Price Outstanding, Ending Balance | $ / shares	2.17
Weighted Average Exercise Price Exercisable, Ending Balance | $ / shares	$ 2.19
Weighted Average Remaining Contractual Term Outstanding, Ending	6 years 10 months 24 days
Weighted Average Remaining Contractual Term Exercisable, Ending	6 years 2 months 12 days
Aggregate Intrinsic Value Outstanding, Ending | $	$ 234,627
Aggregate Intrinsic Value Exercisable, Ending | $	$ 229,622