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9. Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2013
Fair Value Measurements Tables  
Schedule of financial liabilities measured at fair value
    Total     Level 1     Level 2     Level 3  
Warrant liability   $ 59,592     $ -     $ -     $ 59,592  
Schedule of activity for liabilities measured at fair value
Balance as of December 31, 2012     267,950  
Issuance of warrant liabilities     995,418  
Exercise of warrant liabilities     (1,006,648 )
Realized and unrealized gain relate to change in fair value     (162,442 )
Balance as of March 31, 2013     94,278  
Issuances of warrant liabilities     -  
Exercise of warrant liabilities     -  
Realized and unrealized loss related to change in fair value     (25,477 )
Balance as of June 30, 2013     68,801  
Issuances of warrant liabilities     -  
Exercise of warrant liabilities     -  
Realized and unrealized loss related to change in fair value     (9,209 )
Balance as of September 30, 2013     59,592