Reconciliation of Derivative Liability Used in Determining Fair Value (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Derivative [Line Items]
Derivative liabilities, Non-current			$ 296,194
Derivative liabilities, Non-current	52,720		52,720
Fair value of derivative liability			(18,142,504)	(294,576)
Conversion options | 8% convertible promissory notes | Fair Value, Inputs, Level 3
Derivative [Line Items]
Derivative Liability	10,695,000	1,520,000	12,400,000	610,000
Fair value of derivative liability	402,000	0	4,387,139	545,426
Change in fair value	(7,225,000)	(460,000)	(12,915,139)	(95,426)
Derivative Liability	3,872,000	1,060,000	3,872,000	1,060,000
Conversion options | 12% Convertible Promissory Notes | Fair Value, Inputs, Level 3
Derivative [Line Items]
Derivative Liability	0
Fair value of derivative liability	157,000		157,000
Change in fair value	(46,000)		(46,000)
Derivative Liability	111,000		111,000
Warrant | 8% convertible promissory notes | Fair Value, Inputs, Level 3
Derivative [Line Items]
Derivative Liability	0	540,000	4,790,000	220,000
Fair value of derivative liability	0	0	391,365	249,151
Change in fair value	0	(270,000)	(5,181,365)	(199,151)
Derivative Liability	0	270,000	0	270,000
Placement agent | Fair Value, Inputs, Level 3
Derivative [Line Items]
Derivative liabilities, Non-current	119,703	122,357	296,194	81,716
Fair value of derivative liability, Non-current	0	0	0	0
Change in fair value, Non-current	(66,983)	0	(243,474)	40,641
Derivative liabilities, Non-current	52,720	122,357	52,720	122,357
Derivative liabilities - current | Fair Value, Inputs, Level 3
Derivative [Line Items]
Derivative Liability	10,695,000	2,060,000	17,190,000	830,000
Fair value of derivative liability	559,000	0	4,935,504	794,577
Change in fair value	(7,271,000)	(730,000)	(18,142,504)	(294,577)
Derivative Liability	3,983,000	1,330,000	3,983,000	1,330,000
Derivative liabilities - total | Fair Value, Inputs, Level 3
Derivative [Line Items]
Derivative Liability	10,814,703	2,182,357	17,486,194	911,716
Fair value of derivative liability	559,000	0	4,935,504	794,577
Change in fair value	(7,337,983)	(730,000)	(18,385,978)	(253,936)
Derivative Liability	$ 4,035,720	$ 1,452,357	$ 4,035,720	$ 1,452,357