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Note 1 - Significant Accounting Policies (Details Textual) - USD ($)
$ in Thousands
Mar. 31, 2023
Jan. 01, 2023
Dec. 31, 2022
Mar. 31, 2022
Dec. 31, 2021
Retained Earnings (Accumulated Deficit) $ 180,097   $ 179,931    
Deferred Income Tax Assets, Net 19,250   22,130    
Financing Receivable, Allowance for Credit Loss 16,269   15,697 $ 16,484 $ 16,621
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss 4,200        
Financing Receivable, Accrued Interest, after Allowance for Credit Loss $ 6,300        
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   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