Income Taxes Income Tax Provision Included in Other Income Expense on Consolidated Statement of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement [Abstract]
Federal	$ 60	$ 0	$ 132
State	465	422	341
Federal	(6)	0	0
State	(192)	(208)	93
Provision for income taxes	$ 327	$ 214	$ 566

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

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