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10. Fair Value Measurements (Details 1) (USD $)
 3 Months Ended
Mar. 31, 2013
Fair Value Measurements Details 1  
Balance as of December 31, 2012 $ 267,950
Issuances of warrant liabilities 995,418
Exercise of warrant liabilities (1,006,648)
Realized and unrealized gain related to change in fair value (162,442)
Balance as of March 31, 2013 $ 94,278