Subsequent Events - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Jan. 31, 2014	Dec. 17, 2013	Oct. 31, 2014
Subsequent Event [Line Items]
Proceeds from Issuance of Common Stock	$ 0	$ 6,487,850
Class of Warrant or Right, Exercise Price of Warrants or Rights			$ 3.04	$ 2.66
Purchase Agreement [Member]
Subsequent Event [Line Items]
Stock Issued During Period, Shares, New Issues	4,673,914
Sale of Stock, Price Per Share	$ 0.46
Proceeds from Issuance of Common Stock	2.15
Ladenburg Thalmann Co. Inc [Member]
Subsequent Event [Line Items]
Class Of Warrant Or Right Warrant term	5 years
Cash Paid To Placement Agent	106,000
Additional Cash paid to Placement Agent	$ 50,000
Additional Class Of Warrant Or Right Issued	108,696
Cash Paid To Holder For Waiver	35,000
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	57,611
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 0.575
Minimum [Member]
Subsequent Event [Line Items]
Class of Warrant or Right, Exercise Price of Warrants or Rights					$ 2.27