MidCap Secured Loan Facility - Future Maturities Of MidCap Obligation (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013
Debt [Line Items]
Total Midcap obligation	$ 7,333,333
Mid Cap [Member]
Debt [Line Items]
2014	7,333,333
2015	8,000,000
2016	4,666,667
Total maturities	20,000,000
Unamortized discount	(821,961)
Total Midcap obligation	$ 19,178,039