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Note 1 - Summary of Significant Accounting Policies (Details Textual)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Jan. 01, 2023
USD ($)
Dec. 31, 2022
USD ($)
Number of Operating Segments 1      
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss $ 2,900 $ 3,500    
Financing Receivable, Accrued Interest, after Allowance for Credit Loss 10,900 9,400    
Goodwill, Impairment Loss 0 0    
Retained Earnings (Accumulated Deficit) 182,236 180,438    
Deferred Income Tax Assets, Net 14,056 16,496    
Financing Receivable, Allowance for Credit Loss $ 17,058 $ 16,776   $ 15,697
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]   Interest Receivable    
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Interest Receivable      
Accounting Standards Update 2016-13 [Member]        
Financing Receivable, Allowance for Credit Loss     $ 15,697  
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]        
Retained Earnings (Accumulated Deficit)     (603)  
Deferred Income Tax Assets, Net     188  
Financing Receivable, Allowance for Credit Loss   $ 0 518 $ 518
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] | OBS Credit Exposures [Member]        
Financing Receivable, Allowance for Credit Loss     $ 273  
Equipment [Member] | Minimum [Member]        
Property, Plant and Equipment, Useful Life (Year) 3 years      
Equipment [Member] | Maximum [Member]        
Property, Plant and Equipment, Useful Life (Year) 7 years      
Building [Member] | Minimum [Member]        
Property, Plant and Equipment, Useful Life (Year) 15 years      
Building [Member] | Maximum [Member]        
Property, Plant and Equipment, Useful Life (Year) 40 years