License Agreements - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Total amount paid in connection with license	$ 2,500,000
Capitalized net present value of total amount paid under initial terms of license	1,500,000
Amortization expense related to license agreement	7,800
Net book value	$ 93,000	$ 191,000
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Patent life	15 years 6 months