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Notes Payable (Detail) (USD $)
Dec. 31, 2012
Dec. 31, 2011
Debt Conversion [Line Items]    
Convertible notes (C-1, C-2 and C-3)   $ 2,579,220
Debt discount-beneficial conversion feature   (867,273)
Debt discount-warrant value   (62,073)
Promissory note-long term portion 164,187 1,649,874
Net $ 164,187 $ 1,649,874