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Note 4 - Loans Receivable and Credit Disclosures - Loans Receivable Impairment Analysis (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Ending loans receiveable balance: Individually evaluated for credit losses |  | $ 14,386
Ending loans receivable balance: Collectively evaluated for credit losses |  | 1,227,322
Loans receivable | $ 1,294,178 | 1,241,708
Construction Real Estate [Member] |  |
Ending loans receiveable balance: Individually evaluated for credit losses |  | 0
Ending loans receivable balance: Collectively evaluated for credit losses |  | 51,253
Loans receivable | 63,050 | 51,253
Family Residential Real Estate 1-4 [Member] |  |
Ending loans receiveable balance: Individually evaluated for credit losses |  | 805
Ending loans receivable balance: Collectively evaluated for credit losses |  | 284,302
Loans receivable | 289,404 | 285,107
Multifamily [Member] |  |
Ending loans receiveable balance: Individually evaluated for credit losses |  | 0
Ending loans receivable balance: Collectively evaluated for credit losses |  | 185,784
Loans receivable | 195,536 | 185,784
Commercial Real Estate Portfolio Segment [Member] |  |
Ending loans receiveable balance: Individually evaluated for credit losses |  | 12,853
Ending loans receivable balance: Collectively evaluated for credit losses |  | 340,432
Loans receivable | 359,266 | 353,285
Agriculture Real Estate [Member] |  |
Ending loans receiveable balance: Individually evaluated for credit losses |  | 165
Ending loans receivable balance: Collectively evaluated for credit losses |  | 159,283
Loans receivable | 161,517 | 159,448
Commercial Portfolio Segment [Member] |  |
Ending loans receiveable balance: Individually evaluated for credit losses |  | 200
Ending loans receivable balance: Collectively evaluated for credit losses |  | 77,065
Loans receivable | 89,729 | 77,265
Agriculture [Member] |  |
Ending loans receiveable balance: Individually evaluated for credit losses |  | 342
Ending loans receivable balance: Collectively evaluated for credit losses |  | 113,013
Loans receivable | 119,136 | 113,355
Consumer and Other [Member] |  |
Ending loans receiveable balance: Individually evaluated for credit losses |  | 21
Ending loans receivable balance: Collectively evaluated for credit losses |  | 16,190
Loans receivable | $ 16,540 | $ 16,211

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