Income Taxes - Income Tax Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Federal income taxes:
Current	$ (14)	$ (516)	$ (197)
Deferred	37	(131)	(109)
State income taxes:
Current	(1)	(62)	(24)
Deferred	7	(16)	(13)
Income tax benefit (provision)	$ 29	$ (725)	$ (343)