Income Taxes (Statutory Federal Income Tax Rate) (Details) - CTRS - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Amount
Federal income tax benefit (expense)	$ (65)	$ 143	$ 47
State income tax benefit (expense), net of federal income tax effect	(12)	27	5
Deferred tax adjustment	(127)
Change in deferred tax assets as a result of change in tax law	0	0	(340)
Valuation allowance	(45)	(174)	283
Other	(5)	4	5
Benefit applicable to income (loss) from continuing operations	$ 0	$ 0	$ 0
Rate
Federal income tax benefit (expense) (percent)	21.00%	21.00%	35.00%
State income tax benefit (expense), net of federal income tax effect (percent)	4.00%	4.00%	4.00%
Deferred tax adjustment (percent)	(41.00%)
Change in deferred tax assets as a result of change in tax law (percent)	0.00%	0.00%	(254.00%)
Valuation allowance (percent)	15.00%	(26.00%)	211.00%
Other (percent)	1.00%	1.00%	4.00%
Benefit applicable to income (loss) from continuing operations (percent)	0.00%	0.00%	0.00%

Effective Income Tax Rate Reconciliation Deferred Tax Adjustments

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