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Equity (Tables)
3 Months Ended
Mar. 31, 2014
Stock Options [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary of option activities
        
Weighted
    
        
Average
    
     
Weighted
  
Remaining
  
Aggregate
 
  
Number of
  
Average
  
Contractual
  
Intrinsic
 
  
Units
  
Exercise Price
  
Term (in years)
  
Value
 
             
Outstanding, December 31, 2013
  
1,985,384
  
 $
3.23
   
8.34
  
 $
5,908,696
 
 Issued
  
291,500 
   
 7.86
   
10 
     
 Exercised
  
(11,655)
   
0.78
   
-
   
-
 
Outstanding, March 31, 2014
  
2,265,229
  
 $
3.84
   
8.34
  
 $
19,514,362
 
 
Warrants [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary of option activities
        
Weighted
    
        
Average
    
     
Weighted
  
Remaining
  
Aggregate
 
  
Number of
  
Average
  
Contractual
  
Intrinsic
 
  
Units
  
Exercise Price
  
Term (in years)
  
Value
 
             
Outstanding, December 31, 2013
  
9,673,290
   
1.06
   
4.89
   
  47,396,307
 
  Granted
  
306,928
   
7.88
   
  6.63
     
  Exercised
  
(299,885
)
  
1.04
         
Outstanding, March 31, 2014
  
9,680,333
  
$
1.28
   
4.71
  
$
107,268,785