Income Taxes (Reconciliation Of The Statutory U.S. Federal Income Tax And The Income Tax Provision) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Income Taxes [Abstract]
Statutory rate	21.00%	21.00%
Tax (benefit) expense at statutory rate	$ (764)	$ (99)
State income tax (benefit) expense	(148)	321
Permanent difference	184
Return to provision	1
Stock Compensation Tax Deficit - ASU 2016-09	7	4
NOL Expiration	334	557
Other		(40)
Net change in deferred tax asset valuation allowance	386	(771)
Total income tax provision (benefit)		$ (28)

Effective Income Tax Rate Reconciliation, Net Operating Loss

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Income Tax Reconciliation, Permanent Difference

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Tax Cuts and Jobs Act, Measurement Period Adjustment, Income Tax Expense (Benefit)

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to revisions of previously reported income tax expense (benefit).

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