Debt - Additional Information (Detail) (USD $)	1 Months Ended	12 Months Ended
	Jun. 30, 2012	Dec. 31, 2013	Dec. 31, 2012	Jan. 31, 2013	Jul. 31, 2012
Debt Instrument [Line Items]
Loan and security agreement, expiration date		Jun. 01, 2022
Unamortized debt discount, related to the initial fair value of warrants		$ 45,947	$ 20,208
Loan and security agreement [Member]
Debt Instrument [Line Items]
Loan and security agreement, maximum credit	3,000,000
Loan and security agreement, interest rate	4.50%
Loan and security agreement, payback period	24 months
Loan and security agreement, amount drawn				2,000,000	1,000,000
Loan and security agreement, available credit		0	2,000,000
Loan and security agreement, interest incurred		136,625	20,000
Loan and security agreement [Member] | Warrants for Convertible Preferred Stock [Member]
Debt Instrument [Line Items]
Warrants exercisable, stock issued				8,000
Warrants exercisable, exercise price				7.50
Loan and security agreement [Member] | Series A Convertible Preferred Stock [Member] | Warrants for Convertible Preferred Stock [Member]
Debt Instrument [Line Items]
Warrants exercisable, stock issued				8,000	4,000
Warrants exercisable, exercise price				7.50	7.50
Initial fair value of warrant issued				$ 49,000	$ 24,250