Intangible Assets - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Schedule of Intangible Assets Disclosure [Line Items]
Patent amortization expense	$ 23,525	$ 25,770	$ 47,050	$ 54,633
Patent life			10 years