Hedge Accounting (Schedule Of Derivative Instruments On The Balance Sheet At Fair Value) (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Derivative financial instruments - current portion	$ 218,000	$ 109,000
Derivative financial instruments - non-current portion	212,000	233,000
Total derivatives	430,000	342,000
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative financial instruments - non-current portion	212,000	233,000
Total derivatives designated as hedging instruments	430,000	342,000
Total derivatives	430,000	342,000
Interest Rate Contracts [Member] \| Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative financial instruments - current portion	$ 218,000	$ 109,000

Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

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