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Note 3 - New Accounting Standards (Details Textual) - USD ($)
$ in Thousands
Mar. 31, 2023
Jan. 01, 2023
Dec. 31, 2022
Mar. 31, 2022
Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss $ 11,342   $ 10,277 $ 9,584 $ 9,279
Retained Earnings (Accumulated Deficit) 138,952   138,409    
Off-Balance-Sheet, Credit Loss, Liability $ 100        
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]          
Financing Receivable, Allowance for Credit Loss   $ 1,100 $ 1,070    
Deferred Tax Assets, Gross   300      
Retained Earnings (Accumulated Deficit)   (800)      
Off-Balance-Sheet, Credit Loss, Liability   $ 100