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11. Stockholder's Equity (Tables)
 6 Months Ended
Jun. 30, 2013
Equity [Abstract]  
Fair value of the warrants estimated at the date of grant using the Black-Scholes option pricing model
Risk-free interest rate 0.15%
Expected dividend Yield None
Expected term 1 year
Expected volatility 75.4%
Common Stock Warrant
   

Number of

Warrants

    

Exercise

Prices

  
                 
Balance, December 31, 2010     725,000     $ .20 - $.75  
Warrants exercised     (125,000 )   $ .30 - $.40  
Balance, December 31, 2011     600,000     $ .30 - $.60  
Warrants issued     1,734,667     $ 2.50 - $4.50  
Warrants exercised     (250,000 )   $ .30 - $2.50  
Warrants expired     (150,000 )   $ .30 - $.40  
Balance, December 31, 2012     1,934,667     $ .25 - $4.50  
Warrants issued     362,500     $ 1.20  
Balance, June 30, 2013     2,297,167     $ .25 - $4.50  

 
Warrants Maturity
Year ended December 31:    
2013     412,500  
2014     1,157,750  
2015     476,917  
Thereafter     250,000  
      2,297,167