Investments (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Investments [Abstract]
Net realized gains (losses) from the sale of marketable securities	$ 0	$ 3	$ 1	$ 6
Cost method investment, description			The Company holds shares of Series B Preferred Stock of SHYFT Analytics, Inc., purchased via a private placement. This investment is accounted for under the cost method and is included in other assets on the Company's consolidated balance sheet
Cost method investment, original cost	$ 4,000		$ 4,000