Income Taxes - Components of Income Tax Benefit (Provision) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current:
Federal	$ (859)	$ (656)	$ 68
State	(344)	(251)	(297)
Deferred:
State	10	(182)	112
Income Tax Provision	$ (1,193)	$ (1,089)	$ (117)