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Investment Securities (Details Narrative) - USD ($)
9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Marketable Securities [Line Items]      
Debt Securities, Available-for-Sale $ 338,350,000    
Federal Home Loan Bank Stock 792,100   $ 698,400
Corporate Fixed To Float Bonds [Member]      
Marketable Securities [Line Items]      
Debt Securities, Available-for-Sale 8,100,000   8,000,000.0
Mutual Funds [Member]      
Marketable Securities [Line Items]      
Debt Securities, Available-for-Sale 11,600   11,600
Available-for-Sale Securities, Gross Realized Gains 900 $ 1,700  
Debt Security, Corporate, Non-US [Member]      
Marketable Securities [Line Items]      
Debt Securities, Available-for-Sale 10,000.0   10,000.0
Corporate Bond Securities [Member]      
Marketable Securities [Line Items]      
Debt Securities, Available-for-Sale 1,000,000.0   1,000,000.0
Venture Capital Funds [Member]      
Marketable Securities [Line Items]      
Debt Securities, Available-for-Sale 136,700   86,700
Mortgage-Backed Securities, Issued by US Government Sponsored Enterprises [Member]      
Marketable Securities [Line Items]      
Security Owned and Pledged as Collateral, Amortized Cost 418,900,000   429,000,000.0
Financial Instruments, Owned, at Fair Value 390,000,000.0   429,000,000.0
Mortgage-Backed Securities, Issued by Private Enterprises [Member]      
Marketable Securities [Line Items]      
Security Owned and Pledged as Collateral, Amortized Cost 39,800   48,200
Financial Instruments, Owned, at Fair Value $ 40,200   $ 46,400