Quarterly report pursuant to sections 13 or 15(d)

Derivative Warrant Liability (Details)

v2.4.0.8
Derivative Warrant Liability (Details) (Level 3 [Member], USD $)
 3 Months Ended 12 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Derivative Warrant Liability [Line Items]    
Number of shares underlying the warrants 19,873,714 19,873,714
Volatility 89.23% 90.11%
Risk free interest rate 0.90% 0.78%
Expected dividend yield 0.00% 0.00%
Stock price $ 0.78 $ 1.25
Maximum [Member]
    
Derivative Warrant Liability [Line Items]    
Exercise price $ 1.05 $ 1.05
Expected warrant life (years) 4 years 8 months 9 days 4 years 11 months 9 days
Minimum [Member]
    
Derivative Warrant Liability [Line Items]    
Exercise price $ 1.00 $ 1.00
Expected warrant life (years) 4 years 6 months 11 days 4 years 9 months 11 days