v3.26.1
Premises and Equipment (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Jan. 31, 2026
Dec. 31, 2025
Premises and Equipment            
Gross before accumulated depreciation and construction in progress $ 21,246,000   $ 21,246,000     $ 21,086,000
Less accumulated depreciation 14,047,000   14,047,000     13,725,000
Construction in progress 138,000   138,000     59,000
Total 7,337,000   7,337,000     7,420,000
Branch lease            
Premises and Equipment            
Lease rent expense 20,400 $ 20,400 40,800 $ 40,800    
Oak Park Office Lease            
Premises and Equipment            
Term of lease         3 years  
Right-of-use asset $ 337,661   $ 337,661     $ 0
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Other Assets   Other Assets     Other Assets
Lease liability $ 339,174   $ 339,174     $ 0
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] Accounts Payable and Accrued Liabilities   Accounts Payable and Accrued Liabilities     Accounts Payable and Accrued Liabilities
Remaining lease term 4 years 6 months   4 years 6 months      
Payments remaining on operating lease            
2026 $ 39,000   $ 39,000      
2027 80,000   80,000      
2028 82,000   82,000      
2029 83,000   83,000      
2030 85,000   85,000      
Total 369,000   369,000      
Land            
Premises and Equipment            
Gross before accumulated depreciation and construction in progress 961,000   961,000     $ 961,000
Building and improvements            
Premises and Equipment            
Gross before accumulated depreciation and construction in progress 17,575,000   17,575,000     17,459,000
Furniture, fixtures, and equipment            
Premises and Equipment            
Gross before accumulated depreciation and construction in progress $ 2,710,000   $ 2,710,000     $ 2,666,000