Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Stock Options, Stock Purchase Plan and Warrants (Details 5)

v2.4.0.6
Stock Options, Stock Purchase Plan and Warrants (Details 5)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Valuation of Warrants under trinomial lattice model    
Expected term in years 3 years 8 months 12 days 3 years 7 months 6 days
Risk-free interest rate (%) 0.60% 1.18%
Weighted average expected volatility (%) 51.00% 55.00%
Dividend yield (%) 0.00% 0.00%
Warrant [Member]
   
Valuation of Warrants under trinomial lattice model    
Expected term in years 3 years 8 months 12 days  
Risk-free interest rate (%) 0.50%  
Weighted average expected volatility (%) 52.00%  
Dividend yield (%) 0.00%