Segment Information (Details 3) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Total consolidated identifiable assets	$ 22,416	$ 27,020
North America [Member]
Segment Reporting Information [Line Items]
Total consolidated identifiable assets	10,449	15,364
U.K. [Member]
Segment Reporting Information [Line Items]
Total consolidated identifiable assets	6,384	9,090
Other Foreign Markets [Member]
Segment Reporting Information [Line Items]
Total consolidated identifiable assets	$ 5,583	$ 2,566