Share-Based Payment Arrangements (Details 2) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of Options Outstanding, Beginning	2,026,200
Number of Options, Granted	0
Number of Options, Exercised	0
Number of Options, Forfeited	(451,000)
Number of Options, Expired	(221,500)
Number of Options Outstanding, Ending	1,353,700	2,026,200
Number of Options, Exercisable	1,031,500
Number of Options, Expected to Vest after end of period	322,200
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)	$ 2.14
Weighted Average Exercise Price, Granted (in dollars per share)	0.00
Weighted Average Exercise Price, Exercised (in dollars per share)	0.00
Weighted Average Exercise Price, Forfeited (in dollars per share)	2.55
Weighted Average Exercise Price, Expired (in dollars per share)	5.82
Weighted Average Exercise Price, Outstanding, Ending (in dollars per share)	1.40	$ 2.14
Weighted Average Exercise Price, Exercisable (in dollars per share)	1.63
Weighted Average Exercise Price, Expected to Vest After End of Period (in dollars per share)	$ 0.67
Weighted Average Remaining Contractual Life (in years), Outstanding	5 years 7 months 7 days	5 years 3 months 27 days
Weighted Average Remaining Contractual Life (in years), Exercisable	4 years 10 months 25 days
Weighted Average Remaining Contractual Life (in years), Expected to Vest after end of period	7 years 5 months 20 days
Aggregate Intrinsic Value, Outstanding	$ 0	$ 0
Aggregate Intrinsic Value, Exercisable	0
Aggregate Intrinsic Value, Expected to Vest	$ 0