Stock-Based Compensation (Details 3) (USD $)	12 Months Ended
	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Options, Non-vested - December 31, 2012	1,561,869
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	222,500
Stock Options, Vested/Exercised	(883,882)
Stock Options, Forfeited/Cancelled	(144,444)
Stock Options, Non-vested - December 31, 2013	756,043
Weighted Average Grant Date Fair Value, Non-vested - December 31, 2012	$ 2.11
Weighted Average Grant Date Fair Value, Granted	$ 1.69
Weighted Average Grant Date Fair Value, Vested/Exercised	$ 1.93
Weighted Average Grant Date Fair Value, Forfeited/Cancelled	$ 2.27
Weighted Average Grant Date Fair Value, Non-vested - December 31, 2013	$ 2.17
Stock Options, Weighted average remaining period for vesting	1 year 3 months 18 days