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Income Taxes (Reconciliation of Income Tax Rate) (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Income Taxes [Abstract]
Statutory U.S. federal income tax rate	21.00%	21.00%
State income taxes, net of federal tax benefit	2.90%	5.00%
Valuation allowance	(20.10%)	(59.70%)
State rate and other changes in deferred taxes	(1.10%)	1.00%
Federal and state credits	0.10%	0.10%
Uncertain tax positions	1.70%	(0.30%)
Nondeductible expenses and other	(4.30%)	(0.50%)
Effective income tax rate	0.20%	(33.40%)

X

- Definition

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

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

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Percentage 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 changes in the valuation allowance for deferred tax assets.

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