Shareholders' Equity (Details 3) - Stock Options [Member] - USD ($)		3 Months Ended	12 Months Ended
		Mar. 31, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Number of Shares Underlying Options, Outstanding, Beginning balance		11,472
Number of Shares Underlying Options, Granted
Number of Shares Underlying Options, Exercised
Number of Shares Underlying Options, Expired
Number of Shares Underlying Options, Outstanding, Ending balance		11,472	11,472
Number of Shares Underlying Options, Outstanding and Exercisable		1,701
Weighted Average Exercise Price, Outstanding, Beginning balance		$ 19.35	$ 19.35
Weighted Average Exercise Price, Granted
Weighted Average Exercise Price, Exercised
Weighted Average Exercise Price, Expired
Weighted Average Exercise Price, Outstanding, Ending balance		19.35	19.35
Weighted Average Exercise Price, Outstanding and Exercisable		19.35
Weighted Average Grant Date Fair Value, Outstanding, Beginning balance		4.78
Weighted Average Grant Date Fair Value, Granted
Weighted Average Grant Date Fair Value, Exercised
Weighted Average Grant Date Fair Value, Expired
Weighted Average Grant Date Fair Value, Outstanding, Ending balance		4.78	$ 4.78
Weighted Average Grant Date Fair Value, Outstanding and Exercisable		$ 4.78
Weighted Average Remaining Contractual Life, Outstanding		3 years 4 months 17 days	3 years 7 months 10 days
Weighted Average Remaining Contractual Life, Outstanding and Exercisable		3 years 4 months 17 days
Aggregate Intrinsic Value, Outstanding	[1]
Aggregate Intrinsic Value, Outstanding and Exercisable	[1]

[1] The aggregate intrinsic value is based on the $0.57 closing price as of March 29, 2018 for the Company's Common Stock.