Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Black-Scholes option valuation model assumptions (Details)

v2.4.0.6
Stock-Based Compensation - Black-Scholes option valuation model assumptions (Details) (USD $)
Dec. 31, 2012
MaximumMember
 
Exercise price $ 0.51
Market price on date of grant $ 0.51
Risk-free interest rate 0.895%
Expected (years) 6.25
Volatility 82.90%
Fair value per share at grant date $ 0
MinimumMember
 
Exercise price $ 0.71
Market price on date of grant $ 0.71
Risk-free interest rate 1.74%
Expected (years) 10
Volatility 85.40%
Fair value per share at grant date $ 1