Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation Plans and Awards (Schedule of Fair Value Calculation Assumptions) (Details)

v3.3.0.814
Stock-based Compensation Plans and Awards (Schedule of Fair Value Calculation Assumptions) (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
[1]
Sep. 30, 2015
Sep. 30, 2014
Assumptions used for calculation of fair value per share        
Dividend yield
Risk-free interest rate 1.68%    
Risk-free interest rate, minimum     1.41% 1.74%
Risk-free interest rate, maximum     2.50% 2.61%
Expected term 6 years 29 days    
Volatility 75.27%    
Volatility, minimum     73.21% 65.66%
Volatility, maximum     75.27% 66.46%
Minimum [Member]        
Assumptions used for calculation of fair value per share        
Expected term     6 years 29 days 6 years 29 days
Maximum [Member]        
Assumptions used for calculation of fair value per share        
Expected term     10 years 10 years
[1] No options were granted for the three months ended September 30, 2014.