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Note 4 - Allowance for Credit Losses - Allowance by Impairment Methodology and Loans by Impairment Methodology (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2023
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Balance   $ 7,446 $ 5,710 $ 5,710
Charge-offs   (1,085) (213) (529)
Recoveries   266 305 415
Financing Receivable, Credit Loss, Expense (Reversal)   45 400 1,850
Balance $ 8,858 8,858 6,202 7,446
Individually evaluated 0 0 0 888
Collectively evaluated 8,858 8,858 6,202 6,558
Loans 930,194 930,194 880,089 920,523
Individually evaluated 677 677 442 2,673
Collectively evaluated 929,517 929,517 879,647 917,850
Accounting Standards Update 2016-13 [Member]        
Financing Receivable, Credit Loss, Expense (Reversal) 12      
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Balance   2,186    
Balance       2,186
Real Estate 1 [Member] | Construction and Land Development [Member]        
Balance   546 345 345
Charge-offs   0 0 0
Recoveries   1 7 10
Financing Receivable, Credit Loss, Expense (Reversal)   68 (9) 191
Balance 302 302 343 546
Individually evaluated 0 0 0 0
Collectively evaluated 302 302 343 546
Loans 49,282 49,282 49,118 51,840
Individually evaluated 40 40 0 1,045
Collectively evaluated 49,242 49,242 49,118 50,795
Real Estate 1 [Member] | Construction and Land Development [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Balance   (313)    
Balance       (313)
Real Estate 1 [Member] | Secured by Multi-family Residential Properties [Member]        
Balance   1,108 1,077 1,077
Charge-offs   0 (5) (6)
Recoveries   9 10 19
Financing Receivable, Credit Loss, Expense (Reversal)   77 (40) 18
Balance 2,603 2,603 1,042 1,108
Individually evaluated 0 0 0 0
Collectively evaluated 2,603 2,603 1,042 1,108
Loans 337,601 337,601 312,083 331,421
Individually evaluated 567 567 420 530
Collectively evaluated 337,034 337,034 311,663 330,891
Real Estate 1 [Member] | Secured by Multi-family Residential Properties [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Balance   1,409    
Balance       1,409
Real Estate 1 [Member] | Other Real Estate Loans [Member]        
Balance   3,609 3,230 3,230
Charge-offs   0 0 0
Recoveries   13 4 15
Financing Receivable, Credit Loss, Expense (Reversal)   (80) 334 364
Balance 5,244 5,244 3,568 3,609
Individually evaluated 0 0 0 0
Collectively evaluated 5,244 5,244 3,568 3,609
Loans 421,970 421,970 401,037 418,456
Individually evaluated 70 70 22 13
Collectively evaluated 421,900 421,900 401,015 418,443
Real Estate 1 [Member] | Other Real Estate Loans [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Balance   1,702    
Balance       1,702
Commercial and Industrial Loans [Member]        
Balance   1,874 718 718
Charge-offs   (877) (8) (32)
Recoveries   144 146 145
Financing Receivable, Credit Loss, Expense (Reversal)   (137) 20 1,043
Balance 617 617 876 1,874
Individually evaluated 0 0 0 888
Collectively evaluated 617 617 876 986
Loans 112,803 112,803 109,548 111,225
Individually evaluated 0 0 0 1,085
Collectively evaluated 112,803 112,803 109,548 110,140
Commercial and Industrial Loans [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Balance   (387)    
Balance       (387)
Consumer and Other Loans [Member]        
Balance   309 340 340
Charge-offs   (208) (200) (491)
Recoveries   99 138 226
Financing Receivable, Credit Loss, Expense (Reversal)   117 95 234
Balance 92 92 373 309
Individually evaluated 0 0 0 0
Collectively evaluated 92 92 373 309
Loans 8,538 8,538 8,303 7,581
Individually evaluated 0 0 0 0
Collectively evaluated $ 8,538 8,538 $ 8,303 7,581
Consumer and Other Loans [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]        
Balance   $ (225)    
Balance       $ (225)