Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%			35.00%
Lessee, Operating Lease, Liability, Payments, Due	$ 3,200
Net Cash Provided by (Used in) Operating Activities	(2,900)	$ (1,412)
Accounting Standards Update 2016-18 [Member]
Decrease in cash from operating activities	$ 700
Scenario, Plan [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%
Trademarks and Customer Lists [Member]
Finite-Lived Intangible Asset, Useful Life	10 years