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Regulatory Matters (Details)
$ in Thousands
Sep. 30, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
Dec. 31, 2015
Actual [Abstract]        
Tier 1 (Leverage), Amount $ 47,779 $ 48,541    
Tier 1 (Leverage), Ratio 0.0984 0.1156    
Common Equity Tier 1, Amount $ 47,779 $ 48,541    
Common Equity Tier 1, Ratio 0.1694 0.1714    
Tier 1, Amount $ 47,779 $ 48,541    
Tier 1, Ratio 0.1694 0.1714    
Total Capital, Amount $ 51,053 $ 51,790    
Total Capital, Ratio 0.1810 0.1829    
Minimum Capital Requirements [Abstract]        
Tier 1 (Leverage), Amount $ 19,429 $ 16,798    
Tier 1 (leverage), Ratio 0.0400 0.0400    
Common Equity Tier 1, Amount $ 12,693 $ 12,743    
Common Equity Tier 1, Ratio 0.0450 0.0450    
Tier 1, Amount $ 16,924 $ 16,990    
Tier 1, Ratio 0.0600 0.0600    
Total Capital, Amount $ 22,565 $ 22,654    
Total Capital, Ratio 0.0800 0.0800    
Minimum Required To Be Well Capitalized Under Prompt Corrective Action Provisions [Abstract]        
Tier 1 (Leverage), Amount $ 24,286 $ 20,997    
Tier 1 (Leverage), Ratio 0.0500 0.0500    
Common Equity Tier 1, Amount $ 18,334 $ 18,406    
Common Equity Tier 1, Ratio 0.0650 0.0650    
Tier 1, Amount $ 22,565 $ 22,654    
Tier 1, Ratio 0.0800 0.0800    
Total Capital, Amount $ 28,206 $ 28,318    
Total Capital, Ratio 0.1000 0.1000    
Conservation Buffer Rule Starting January 1, 2016 [Member]        
Regulatory Matters [Abstract]        
Capital conservation buffer percentage       0.625%
Conservation Buffer Rule Subsequent to 2016 [Member]        
Regulatory Matters [Abstract]        
Capital conservation buffer annual increase percentage       0.625%
Conservation Buffer Rule [Member]        
Regulatory Matters [Abstract]        
Capital conservation buffer percentage     2.50%