Quarterly report pursuant to sections 13 or 15(d)

7. Derivative liability (Details)

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7. Derivative liability (Details) (USD $)
0 Months Ended 12 Months Ended
Sep. 30, 2013
Dec. 31, 2012
Jan. 15, 2013
2009 Fall Warrants [Member]
Dec. 31, 2012
2009 Fall Warrants [Member]
Jan. 15, 2013
Warrants
Dec. 31, 2012
Warrants
Derivative [Line Items]            
Risk-free interest rate         0.09% 0.02%
Expected volatility         165.00% 165.00%
Expected life (in years)         15 days 15 days
Expected dividend yield         0.00% 0.00%
Derivative liabilitiy $ 0 $ 3,221,138 $ 3,441,752 $ 3,221,138