Share-Based Payment Arrangements (Details 2) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of Options Outstanding, Beginning	5,466,936
Number of Options, Granted	340,000
Number of Options, Exercised	(43,560)
Number of Options, Forfeited	(666,185)
Number of Options, Expired	(241,250)
Number of Options Outstanding, Ending	4,855,941	5,466,936
Number of Options, Exercisable	4,046,871
Number of Options, Expected to Vest after end of period	566,349
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted Average Exercise Price, Outstanding, Beginning (in dollars per share)	$ 3.93
Weighted Average Exercise Price, Granted (in dollars per share)	1.81
Weighted Average Exercise Price, Exercised (in dollars per share)	1.36
Weighted Average Exercise Price, Forfeited (in dollars per share)	5.00
Weighted Average Exercise Price, Expired (in dollars per share)	6.50
Weighted Average Exercise Price, Outstanding, Ending (in dollars per share)	3.53	$ 3.93
Weighted Average Exercise Price, Exercisable (in dollars per share)	3.92
Weighted Average Exercise Price, Expected to Vest After End of Period (in dollars per share)	$ 1.60
Weighted Average Remaining Contractual Life (in years), Outstanding	4 years 9 months 5 days	5 years 6 months 4 days
Weighted Average Remaining Contractual Life (in years), Exercisable	4 years 1 month 17 days
Weighted Average Remaining Contractual Life (in years), Expected to Vest after end of period	7 years 10 months 18 days
Aggregate Intrinsic Value, Outstanding	$ 632,581	$ 7,350
Aggregate Intrinsic Value, Exercisable	374,972
Aggregate Intrinsic Value, Expected to Vest	$ 180,326