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Warrants (Tables) (Warrant [Member])
 3 Months Ended
Mar. 31, 2013
Warrant [Member]
  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Significant assumptions used to measure the fair value of warrants
 
 
2013
    
2012
  
Stock price
  
$
0.24
    
$
0.37
  
Term
2.58-5 Years
    
3.58-4.99 Years
  
Volatility
    
50
%
    
50
%
Risk-free interest rate
    
0.36 – 0.77
%
    
0.51
%
Exercise prices
  
$
0.25-0.4488
    
$
0.25-0.35
  
Dividend yield
    
0.00
%
    
0.00
%
Delta
    
0.04-0.08
      
0.08
  
Up ratio
    
1,103-1.144
      
1.144
  
Down ratio
    
0.857-0.897
      
0.857-0.858
  
Up transition probability
    
0.500-0.501
      
0.500