Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation (Fair Value Valuation Assumptions) (Details)

v2.4.0.8
Basis of Presentation (Fair Value Valuation Assumptions) (Details)
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Summary of fair-value options awarded to employees and directors    
Risk-free interest rate 1.90% 1.10%
Dividend yield 0.00% 0.00%
Expected volatility 69.00% 70.00%
Expected term 6 years 5 months 9 days 6 years 3 months 18 days
Forfeiture rate 9.70% 9.80%