Changes in Liabilities with Significant Unobservable Inputs (Level 3) (Detail) (USD $)	9 Months Ended		12 Months Ended
	Sep. 30, 2013		Dec. 31, 2012
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance	$ 2,335,560		$ 0
Liabillity on issuance of debt and warrants	1,691,267		4,678,260
Change in estimated fair value	(1,761,969)	[1]	211,037
Elimination of liability on conversion	(65,064)		(2,553,737)
Balance	2,199,794		2,335,560
Warrant
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance	1,730,044		0
Liabillity on issuance of debt and warrants	762,111		2,510,919
Change in estimated fair value	(847,119)	[1]	(780,875)
Elimination of liability on conversion	0		0
Balance	1,645,036		1,730,044
Derivative Liability
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance	605,516
Liabillity on issuance of debt and warrants	929,156
Change in estimated fair value	(914,850)	[1]
Elimination of liability on conversion	(65,064)
Balance	$ 554,758

[1] Included in the Statement of Operations on the line “Change in fair value of derivative liabilities.”