Share-Based Payment Arrangements (Details 2) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of Options Outstanding, Beginning	3,491,490
Number of Options, Granted	1,470,000
Number of Options, Exercised	0
Number of Options, Forfeited	(2,772,840)
Number of Options, Expired	(162,450)
Number of Options Outstanding, Ending	2,026,200	3,491,490
Number of Options, Exercisable	1,317,000
Number of Options, Expected to Vest after end of period	709,200
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)	$ 3.18
Weighted Average Exercise Price, Granted (in dollars per share)	0.43
Weighted Average Exercise Price, Exercised (in dollars per share)	0.00
Weighted Average Exercise Price, Forfeited (in dollars per share)	1.97
Weighted Average Exercise Price, Expired (in dollars per share)	11.90
Weighted Average Exercise Price, Outstanding, Ending (in dollars per share)	2.14	$ 3.18
Weighted Average Exercise Price, Exercisable (in dollars per share)	2.91
Weighted Average Exercise Price, Expected to Vest After End of Period (in dollars per share)	$ 0.72
Weighted Average Remaining Contractual Life (in years), Outstanding	5 years 3 months 27 days	4 years 10 months
Weighted Average Remaining Contractual Life (in years), Exercisable	3 years 5 months 10 days
Weighted Average Remaining Contractual Life (in years), Expected to Vest after end of period	8 years 9 months 24 days
Aggregate Intrinsic Value, Outstanding	$ 0	$ 0
Aggregate Intrinsic Value, Exercisable	0
Aggregate Intrinsic Value, Expected to Vest	$ 0