Changes in Liabilities with Significant Unobservable Inputs (Level 3) (Detail) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2014		Dec. 31, 2013
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance	$ 1,104,423		$ 2,335,560
Liabillity on issuance of debt and warrants	0		1,691,267
Change in estimated fair value	2,082,640	[1]	(2,922,404)
Elimination of liability on conversion	0
Balance	3,187,063		1,104,423
Warrant
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance	803,484		1,730,044
Liabillity on issuance of debt and warrants	0		762,111
Change in estimated fair value	1,320,834	[1]	(1,688,671)
Elimination of liability on conversion	0
Balance	2,124,318		803,484
Derivative Liability
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance	300,939
Liabillity on issuance of debt and warrants	0
Change in estimated fair value	761,806	[1]
Elimination of liability on conversion	0
Balance	$ 1,062,745

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