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Summary of Significant Accounting Policies and Activities (Details)
$ in Millions
12 Months Ended
Dec. 31, 2021
USD ($)
Investments
Dec. 31, 2020
USD ($)
Mar. 16, 2020
Mar. 03, 2020
Real estate loan percentage of total loan 85.50% 84.60%    
Federal reserve reduced target federal funds rate basis point     1.00% 0.50%
Cash and cash equivalents $ 5.2 $ 12.6    
Line of credit borrowing capacity 118.5      
Line of credit 15.0      
Minimum [Member]        
Allowance for loan losses 1.0      
Liability for unfunded commitments 2.5      
Maximum [Member]        
Allowance for loan losses 3.0      
Liability for unfunded commitments $ 4.0      
Commercial [Member]        
Total number of loans added under troubled debt restructurings (TDRs) | Investments 6      
Holding Company Line of Credit [Member]        
Line of credit borrowing capacity $ 15.0