Annual report pursuant to Section 13 and 15(d)

Common Stock - Additional Information (Detail)

Common Stock - Additional Information (Detail) (USD $)	0 Months Ended	1 Months Ended		12 Months Ended	0 Months Ended
Common Stock - Additional Information (Detail) (USD $)	Oct. 08, 2014	Aug. 31, 2014	Oct. 31, 2009	Dec. 31, 2014	Apr. 11, 2014	Dec. 31, 2013	Jun. 30, 2013
Common Stock [Line Items]
Common stock, shares authorized				150,000,000us-gaap_CommonStockSharesAuthorized		150,000,000us-gaap_CommonStockSharesAuthorized
Common stock, par value				$ 0.0001		$ 0.0001
Common stock, shares issued				25,938,332us-gaap_CommonStockSharesIssued		6,964,788us-gaap_CommonStockSharesIssued
Common stock, shares outstanding				25,938,332us-gaap_CommonStockSharesOutstanding		6,964,788us-gaap_CommonStockSharesOutstanding
Net Proceeds from common stock				$ 10,305,161
Options to purchase shares of common stock				87,691
Number of common stock called by warrants		162,539	27,839	33,333		301,778	301,778
Common stock exercised under cashless exercise provision				21,500
Reverse stock split	Reverse stock split within a range of 1:1.25 to 1:5
Warrant exercisable term		5 years	5 years
Net proceeds after deducting offering expense				8,402,000
Settlement Agreement [Member]
Common Stock [Line Items]
Common stock, shares issued		541,948
Series A Convertible Preferred Stock [Member]
Common Stock [Line Items]
Preferred stock, shares converted					1,835,212
Series A Non-Convertible Preferred Stock [Member]
Common Stock [Line Items]
Preferred stock, shares converted					200,000
Stock Options [Member]
Common Stock [Line Items]
Common stock, shares issued				87,691
Net Proceeds from common stock				4,450
Minimum [Member]
Common Stock [Line Items]
Reverse Stock Split Range	0.2
Maximum [Member]
Common Stock [Line Items]
Reverse Stock Split Range	0.8
Common Stock [Member]
Common Stock [Line Items]
Conversion of stock, shares issued					2,035,212
Options to purchase shares of common stock				87,691
Aggregate common stock sold, shares				6,000,000
Fair value of stock and warrants				600
Warrant [Member]
Common Stock [Line Items]
Common stock, shares issued				33,333
Net Proceeds from common stock				33,333
Shares issued under cashless exercise of options				15,360
2014 Private Placement [Member]
Common Stock [Line Items]
Common stock, shares issued					6,000,000
Number of common stock called by warrants				10,260,000
Common stock warrants, exercise price				$ 1.00
Warrant exercisable term				5 years
Fair value of stock and warrants				10,260,000
2014 Private Placement [Member] \| Placement Agent Member
Common Stock [Line Items]
Number of common stock called by warrants				2,047,000
Warrant exercisable term				5 years
Placement agent, cash fee				1,023,000
Placement agent, non-accountable expense				308,000
2014 Private Placement [Member] \| Common Stock [Member]
Common Stock [Line Items]
Aggregate common stock sold, shares				10,260,000
Fair value of stock and warrants				5,349,000
2014 Private Placement [Member] \| Warrant [Member]
Common Stock [Line Items]
Fair value of stock and warrants				$ 4,911,000