Stock-Based Compensation (Details Textual) - Stock Option [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Stock-Based Compensation (Textual)
Number of options outstanding	55,500		55,500		99,800
Options outstanding, vested and expected to vest, aggregate intrinsic value	$ 0		$ 0
Share-based compensation expense	$ 0	$ 17	$ 0	$ 29
Term of stock options description			Stock options granted under the 2006 and 2015 Plans are exercisable over a maximum term of ten years from the date of grant, vest in various installments over a one to four-year period and have exercise prices reflecting the market value of the shares of common stock on the date of grant.