Quarterly report pursuant to Section 13 or 15(d)

Equity (Details)

v2.4.0.8
Equity (Details) (USD $)
 3 Months Ended 12 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Dec. 31, 2011
Dec. 31, 2010
Stock Options [Member]
        
Summary of stock option activities        
Number of Units, Beginning balance 1,985,384 2,330,134 273,859   
Issued 291,500      
Exercised (11,655)      
Number of Units, Ending Balance 2,265,229 1,985,384 273,859   
Weighted Average Exercise Price, Beginning balance $ 3.23 $ 0.96 $ 1.29   
Weighted Average Exercise Price, Issued $ 7.86      
Weighted Average Exercise Price, exercised $ 0.78      
Weighted Average Exercise Price, Ending Balance $ 3.84 $ 3.23 $ 1.29   
Weighted Average Remaining Contractual Term (in years), Outstanding 8 years 4 months 2 days 8 years 4 months 2 days    
Weighted Average Remaining Contractual Term (in years), Issued 10 years      
Aggregate Intrinsic Value, Beginning balance $ 5,908,696 $ 685,800      
Aggregate Intrinsic Value, Exercised         
Aggregate Intrinsic Value, Ending Balance 19,514,362 5,908,696      
Warrant [Member]
        
Summary of stock option activities        
Number of Units, Beginning balance 9,673,290 12,770,636 5,364,557  
Issued 306,928      
Exercised (299,885)      
Number of Units, Ending Balance 9,680,333 9,673,290 5,364,557  
Weighted Average Exercise Price, Beginning balance $ 1.06 $ 0.97 $ 0.51  
Weighted Average Exercise Price, Issued $ 7.88      
Weighted Average Exercise Price, exercised $ 1.04      
Weighted Average Exercise Price, Ending Balance $ 1.28 $ 1.06 $ 0.51  
Weighted Average Remaining Contractual Term (in years), Outstanding 4 years 8 months 16 days 4 years 10 months 21 days    
Weighted Average Remaining Contractual Term (in years), Issued 6 years 7 months 17 days      
Aggregate Intrinsic Value, Beginning balance 47,396,307 6,114,768 3,261,367  
Aggregate Intrinsic Value, Ending Balance $ 107,268,785 $ 47,396,307 $ 3,261,367