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Leases, Long-term Lease Agreements Calssified as Operating Leases (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Information about Leases [Abstract]    
Lease liabilities $ 1,378 $ 751
Operating Lease, Liability, Statement of Financial Position [Extensible List] OtherLiabilities OtherLiabilities
Right-of-use asset $ 1,364 $ 751
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] OtherAssets  
Weighted average remaining lease term 4 years 7 months 2 days  
Weighted average discount rate 1.76%  
Lease cost [Abstract]    
Operating lease cost $ 380 336
Total lease cost 380 336
Cash paid for amounts included in the measurement of lease liabilities 377 331
Lease payments due [Abstract]    
Twelve months ending December 31, 2021 352  
Twelve months ending December 31, 2022 339  
Twelve months ending December 31, 2023 248  
Thereafter 549  
Total undiscounted cash flows 1,488  
Discount (110)  
Lease liabilities 1,378 751
Rental expense of premises and equipment $ 415 $ 361