Reconciliation of Derivative Liability Used in Determining Fair Value (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Derivative [Line Items]
Beginning Balance	$ 2,059,077
Gain or loss on the embedded derivative financial instrument	113,300	5,400
Warrants issued in payment of interest	57,034	234,731
Ending Balance	830,000	2,059,077
Conversion Options | 12% convertible revolving credit agreement conversion options
Derivative [Line Items]
Beginning Balance	113,271	0
Fair value of derivative liability	0	118,663
Gain or loss on the embedded derivative financial instrument	(113,271)	(5,392)
Warrants issued in payment of interest	0	0
Ending Balance	0	113,271
Conversion Options | 8% convertible promissory notes
Derivative [Line Items]
Beginning Balance	0	0
Fair value of derivative liability	1,025,691	0
Gain or loss on the embedded derivative financial instrument	(415,691)	0
Warrants issued in payment of interest	0	0
Ending Balance	610,000	0
Warrant | 10% convertible preferred stock warrants
Derivative [Line Items]
Beginning Balance	1,875,463	0
Fair value of derivative liability	0	0
Gain or loss on the embedded derivative financial instrument	0	1,875,463
Warrants issued in payment of interest	(1,875,463)	0
Ending Balance	0	1,875,463
Warrant | 8% convertible promissory notes
Derivative [Line Items]
Beginning Balance	0	0
Fair value of derivative liability	443,309	0
Gain or loss on the embedded derivative financial instrument	(223,309)	0
Warrants issued in payment of interest	0	0
Ending Balance	220,000	0
Warrant | 10% convertible debenture
Derivative [Line Items]
Beginning Balance	70,343	0
Fair value of derivative liability	0	797,185
Gain or loss on the embedded derivative financial instrument	(13,309)	(492,111)
Warrants issued in payment of interest	(57,034)	(234,731)
Ending Balance	0	70,343
Placement Agent | Warrant
Derivative [Line Items]
Beginning Balance	487,555	0
Fair value of derivative liability	0	487,555
Gain or loss on the embedded derivative financial instrument	(405,839)	0
Warrants issued in payment of interest	0	0
Ending Balance	81,716	487,555
Derivative liabilities - Current
Derivative [Line Items]
Beginning Balance	2,059,077	0
Fair value of derivative liability	1,469,000	915,848
Gain or loss on the embedded derivative financial instrument	(765,580)	1,377,960
Warrants issued in payment of interest	(1,932,497)	(234,731)
Ending Balance	830,000	2,059,077
Derivative liabilities - Total
Derivative [Line Items]
Beginning Balance	2,546,632	0
Fair value of derivative liability	1,469,000	1,403,403
Gain or loss on the embedded derivative financial instrument	(1,171,419)	1,377,960
Warrants issued in payment of interest	(1,932,497)	(234,731)
Ending Balance	$ 911,716	$ 2,546,632