Stock-Based Compensation (Details 3) - Stock Option [Member] - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Options, Non-vested - Beginning Balance	2,087,910	756,043	1,561,869
Stock Options, Granted	3,781,666	2,382,500	222,500
Stock Options, Vested/Exercised	(1,382,898)	(1,050,633)	(883,882)
Stock Options, Forfeited/Cancelled	(302,502)		(144,444)
Stock Options, Non-vested - Ending Balance	4,184,176	2,087,910	756,043
Weighted Average Grant Date Fair Value, Non-vested - Beginning Balance	$ 2.30	$ 2.17	$ 2.11
Weighted Average Grant Date Fair Value, Granted	2.12	2.09	1.57
Weighted Average Grant Date Fair Value, Vested/Exercised	2.02	2.35	1.93
Weighted Average Grant Date Fair Value, Forfeited/Cancelled	1.92		2.27
Weighted Average Grant Date Fair Value, Non-vested - Ending Balance	$ 1.97	$ 2.30	$ 2.17
Stock Options, Weighted average remaining period for vesting	2 years 4 months 10 days