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11. Stockholder's Equity (Details) (Warrant [Member], USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Beginning balance, shares 1,934,667 600,000 725,000
Warrants issued, shares 629,740 1,734,667  
Warrants exercised, shares (25,000) (250,000) (125,000)
Warrants expired, shares (50,000) (150,000)  
Ending balance, shares 2,489,407 1,934,667 600,000
2014 1,207,750    
2015 1,031,657    
Thereafter 250,000    
Total 2,489,407    
Minimum [Member]
      
Beginning balance, Exercise Prices $ 0.25 $ 0.30 $ 0.20
Warrants granted, Exercise Prices $ 1.20 $ 2.50 $ 0.30
Warrants exercised, Exercise Prices $ 1.20 $ 0.30  
Warrants expired, Exercise Prices $ 4.50 $ 0.30  
Ending balance Exercise Prices $ 0.60 $ 0.25 $ 0.30
Maximum [Member]
      
Beginning balance, Exercise Prices $ 4.50 $ 0.60 $ 0.75
Warrants granted, Exercise Prices $ 1.60 $ 4.50 $ 0.40
Warrants exercised, Exercise Prices   $ 2.50  
Warrants expired, Exercise Prices   $ 0.40  
Ending balance Exercise Prices $ 4.50 $ 4.50 $ 0.60