Facility Exit Costs (Details Textual) - Facility Exit Costs [Member] - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2017	Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	$ 648,000
Restructuring Reserve		$ 713,000	$ 783,000
Restructuring Reserve, Current		160,000
Restructuring Reserve, Noncurrent		$ 553,000
Facility Exit Costs Payable period		approximately 5 years, through February 2022