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Leased Assets (Schedule of right-of-use assets and related lease liabilities) (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Operating lease liabilities    
Current portion $ 249 $ 451
Noncurrent portion 1,476 1,724
Total operating lease liabilities $ 1,725 2,175
Weighted average remaining lease term of operating leases 12 years 1 month 6 days  
Other Assets [Member]    
Operating Leased Assets [Line Items]    
Right-of-use assets $ 1,694 $ 2,124