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Note 6 - Premises and Equipment (Details Textual) - USD ($)
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Property, Plant and Equipment [Abstract]      
Depreciation $ 1,714,000 $ 1,115,000 $ 1,200,000
Operating liability $ 369,000    
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Other liabilities    
Right-of-use assets $ 369,000    
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Premises and equipment, net