Stock-Based Compensation (Details 3) - Non Vested	12 Months Ended
	Dec. 31, 2016 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Non-vested options at beginning of period (in shares) | shares	1,401,337
Options, Granted (in shares) | shares	739,135
Option, Vested (in shares) | shares	(574,469)
Options, Forfeited (in shares) | shares	(124,837)
Non-vested options at end of period (in shares) | shares	1,441,166
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted Average Grant Date Fair Value, Non-vested options at beginning of period (in dollars per share) | $ / shares	$ 3.60
Weighted Average Grant Date Fair Value, Granted (in dollars per share) | $ / shares	3.45
Weighted Average Grant Date Fair Value, Vested (in dollars per share) | $ / shares	3.46
Weighted Average Grant Date Fair Value, Forfeited (in dollars per share) | $ / shares	3.42
Weighted Average Grant Date Fair Value, Non-vested options at end of period (in dollars per share) | $ / shares	$ 3.58