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Leases (Schedule Of Lease Cost) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]    
Operating lease cost $ 197 $ 365
Amortization of right-of-use assets 414 242
Interest on lease liabilities 115 71
Total lease cost 726 678
Cash paid for amounts included in the measurement of operating lease liabilities 183 348
Cash paid for amounts included in the measurement of finance lease liabilities $ 444 $ 206