Segment Information (Details 3) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Total consolidated identifiable assets	$ 28,786	$ 27,020
North America [Member]
Segment Reporting Information [Line Items]
Total consolidated identifiable assets	15,832	15,364
U.K. [Member]
Segment Reporting Information [Line Items]
Total consolidated identifiable assets	7,681	9,090
Other Foreign Markets [Member]
Segment Reporting Information [Line Items]
Total consolidated identifiable assets	$ 5,273	$ 2,566