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Leases, Long-term Lease Agreements Calssified as Operating Leases (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Information about Leases [Abstract]        
Lease liabilities $ 1,277   $ 1,378 $ 751
Operating Lease, Liability, Statement of Financial Position [Extensible List] Other Liabilities   Other Liabilities Other Liabilities
Right of use assets $ 1,260   $ 1,364 $ 751
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Other Assets      
Weighted average remaining lease term 4 years 4 months 2 days      
Weighted average discount rate 1.76%      
Lease cost [Abstract]        
Operating lease cost $ 104 $ 88    
Total lease cost 104 88    
Cash paid for amounts included in the measurement of lease liabilities 139 $ 84    
Lease payments due [Abstract]        
Nine months ending December 31, 2021 213      
Twelve months ending December 31, 2022 339      
Twelve months ending December 31, 2023 248      
Twelve months ending December 31, 2024 240      
Thereafter 309      
Total undiscounted cash flows 1,349      
Discount (72)      
Lease liabilities $ 1,277   $ 1,378 $ 751