Quarterly report pursuant to sections 13 or 15(d)

2. Summary of significant accounting policies (Details 2)

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2. Summary of significant accounting policies (Details 2) (USD $)
Mar. 31, 2013
Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value of Derivative Liability    $ 3,221,138
Level1 [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value of Derivative Liability 0 0
Level2 [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value of Derivative Liability 0 0
Level3 [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value of Derivative Liability $ 0 $ 3,221,138