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Note 7 - Loans Receivable and Credit Disclosures - Allowance for Loan Losses Impairment Analysis (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | --- | --- | ---
Individually evaluated for credit losses | $ 192 |  | $ 95 |  |  |
Collectively evaluated for credit losses | 16,127 |  | 15,602 |  |  |
Balance June 30, 2023 | 16,319 | $ 16,269 | 15,697 | $ 16,420 | $ 16,484 | $ 16,621
Construction Real Estate [Member] |  |  |  |  |  |
Individually evaluated for credit losses | 0 |  | 0 |  |  |
Collectively evaluated for credit losses | 412 |  | 730 |  |  |
Balance June 30, 2023 | 412 | 391 | 730 | 606 | 645 | 675
Family Residential Real Estate 1-4 [Member] |  |  |  |  |  |
Individually evaluated for credit losses | 10 |  | 10 |  |  |
Collectively evaluated for credit losses | 3,347 |  | 3,018 |  |  |
Balance June 30, 2023 | 3,357 | 3,288 | 3,028 | 2,920 | 2,899 | 2,752
Multifamily [Member] |  |  |  |  |  |
Individually evaluated for credit losses | 0 |  | 0 |  |  |
Collectively evaluated for credit losses | 2,524 |  | 2,493 |  |  |
Balance June 30, 2023 | 2,524 | 2,568 | 2,493 | 2,517 | 2,433 | 2,501
Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |  |
Individually evaluated for credit losses | 0 |  | 0 |  |  |
Collectively evaluated for credit losses | 5,033 |  | 4,742 |  |  |
Balance June 30, 2023 | 5,033 | 5,206 | 4,742 | 5,843 | 5,881 | 5,905
Agriculture Real Estate [Member] |  |  |  |  |  |
Individually evaluated for credit losses | 0 |  | 0 |  |  |
Collectively evaluated for credit losses | 1,214 |  | 1,625 |  |  |
Balance June 30, 2023 | 1,214 | 1,218 | 1,625 | 1,692 | 1,630 | 1,584
Commercial Portfolio Segment [Member] |  |  |  |  |  |
Individually evaluated for credit losses | 97 |  | 0 |  |  |
Collectively evaluated for credit losses | 1,917 |  | 1,153 |  |  |
Balance June 30, 2023 | 2,014 | 1,784 | 1,153 | 1,125 | 1,152 | 1,170
Agriculture [Member] |  |  |  |  |  |
Individually evaluated for credit losses | 70 |  | 68 |  |  |
Collectively evaluated for credit losses | 1,288 |  | 1,637 |  |  |
Balance June 30, 2023 | 1,358 | 1,392 | 1,705 | 1,484 | 1,606 | 1,836
Consumer and Other [Member] |  |  |  |  |  |
Individually evaluated for credit losses | 15 |  | 17 |  |  |
Collectively evaluated for credit losses | 392 |  | 204 |  |  |
Balance June 30, 2023 | $ 407 | $ 422 | $ 221 | $ 233 | $ 238 | $ 198

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