Intangible Assets - Components of Intangible Assets (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Acquired Finite-Lived Intangible Assets [Line Items]
Net Carrying Amount	$ 315,166	$ 356,889
Patents and Licenses [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Cost	1,243,612
Accumulated Amortization	(928,446)
Net Carrying Amount	$ 315,166
Weighted-Average Amortization Period	15 years