Stockholders' Equity - Additional Information (Detail) (USD $)	0 Months Ended		3 Months Ended	6 Months Ended						0 Months Ended			0 Months Ended		6 Months Ended		6 Months Ended	3 Months Ended			6 Months Ended					0 Months Ended	6 Months Ended
	Apr. 03, 2014	Aug. 22, 2013	Jun. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013		Oct. 29, 2013	Aug. 22, 2013	Jul. 21, 2014 Subsequent Event [Member]	Jul. 09, 2014 Subsequent Event [Member]	Jul. 21, 2014 Subsequent Event [Member]	Feb. 05, 2014 Common Stock Equivalents of Convertible Preferred Stock [Member]	Feb. 05, 2014 Common Stock Equivalents of Convertible Preferred Stock [Member]	Jun. 30, 2014 Securities Purchase Agreement [Member]	Feb. 12, 2013 Shelf Registration Statement [Member]	Jun. 30, 2014 ATM Program [Member]	Mar. 31, 2013 Minimum [Member] ATM Program [Member]	Mar. 31, 2013 Maximum [Member] ATM Program [Member]	Jun. 30, 2014 Warrants Derivative Liabilities [Member]	Jun. 30, 2014 Warrants Derivative Liabilities [Member]	Mar. 07, 2014 Series B Prefunded Warrants [Member]	Mar. 05, 2014 Series B Prefunded Warrants [Member]	Oct. 29, 2013 Series B Prefunded Warrants [Member]	Jun. 30, 2013 Series B Prefunded Warrants [Member]	Oct. 29, 2013 Series A Warrants [Member]	Jun. 30, 2014 Series A Warrants [Member]	Oct. 29, 2013 Series A Warrants [Member]
Securities Financing Transaction [Line Items]
Preferred stock, shares authorized			10,000,000	10,000,000		10,000,000	[1]
Preferred stock, par value			$ 0.10	$ 0.10		$ 0.10	[1]
Preferred stock, shares issued			12,300	12,300		0	[1]							12,300
Preferred stock, par value														$ 0.10
Preferred stock stated value, per share														$ 1,000
Preferred stock converted to common stock, shares										4,800,000			1,464,287
Preferred stock converted to common stock, conversion price														$ 8.40
Warrants issued to purchase common stock												11,000,000		1,329,731
Proceeds from issuance of warrants													$ 11,400,000
Warrants issued to purchase common stock, exercise price												2.45		7.40														8.50
Warrants issued, exercisable term													5 years
Derivative fair value inception date				Feb. 05, 2014
Fair Value of warrants																				2,393,513	2,393,513
Change in fair value of warrants, benefit			1,714,826	1,851,428																3,191,352	3,191,352
Liquidated damages paid			29,758	3,419,698
Registration rights agreement description				Under the terms of the Registration Rights Agreement, the Company filed a registration statement on March 18, 2014, which was declared effective by the SEC on April 3, 2014. Should this registration statement cease to remain effective for more than ten consecutive calendar days or more than an aggregate of 15 calendar days during any 12-month period, the Company would be subject to additional liquidated damages of up to approximately $500,000
Additional liquidated damages payable	500,000
Common stock, shares authorized			50,000,000	50,000,000		50,000,000	[1]
Common stock, par value			$ 0.001	$ 0.001		$ 0.001	[1]					$ 0.001
Common stock issued			5,213,969	5,213,969		4,750,160	[1]	422,819
Warrants issued to purchase common stock																								434,325				685,715
Proceeds from issuance of common stock and warrants																										6,000,000
Warrants exercisable date																											May 01, 2014
Warrants expiry date																											May 01, 2019
Offering closed date															Oct. 31, 2013
Warrants exercised																						234,325	200,000		0
Public offering of common stock shares under underwriting agreement																610,000
Initial public offering price per share																$ 13.00
Gross proceeds from sale of common stock																7,900,000
Net proceeds from sale of common stock																7,300,000
Sales agreement termination date																	Feb. 15, 2013
Number of common stock issued through company ATM program																		470,000	660,000
Gross proceeds from sale of common stock																		8,800,000	14,400,000
Net proceeds from sale of common stock																		$ 8,500,000	$ 13,800,000
Number of consecutive business days, non-compliance of minimum bid price		30 days
Minimum bid price									$ 1.00
Reverse stock split, description											One-for-ten reverse split of its common stock
Reverse stock split ratio, common stock											0.1
Common stock outstanding			5,213,969	5,213,969	5,210,747	4,750,160	[1]

[1] Derived from the audited balance sheet as of December 31, 2013