Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Current:
Federal
State and local	17	19
Total current income taxes	17	19
Deferred:
Federal	4,086	(332)
State and local	(10)	1,004
Total deferred income taxes	4,076	672
Valuation allowance	(4,111)	(662)
Provision for income taxes	$ (18)	$ 29