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9. Fair Value Measurements (Tables)
6 Months Ended
Jun. 30, 2013
Fair Value Measurements Tables  
Schedule of financial liabilities measured at fair value
    Total     Level 1     Level 2     Level 3  
Warrant liability   $ 68,801     $ -     $ -     $ 68,801  
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