Income Taxes (Components Of Consolidated TRS's Deferred Tax Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Net operating loss carryforwards	$ 9,871	$ 9,700
Accrued expenses and other	1,641	1,644
Tax credit carryforwards	415	475
Total gross deferred tax assets	11,927	11,819
Valuation allowance	(497)	(497)
Total net deferred tax assets	11,430	11,322
Deferred tax liabilities:
Depreciation and amortization	40	244
Total Net deferred tax assets	$ 11,390	$ 11,078