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Note 7 - Loans Receivable and Credit Disclosures - Amortized Cost Basis of Collateral Dependent Loans (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | --- | --- | ---
Collateral dependent loans | $ 11,340 |  | $ 14,386 |  |  |
Collateral dependent loans, ACL | 16,319 | $ 16,269 | 15,697 | $ 16,420 | $ 16,484 | $ 16,621
Construction Real Estate [Member] |  |  |  |  |  |
Collateral dependent loans | 0 |  | 0 |  |  |
Collateral dependent loans, ACL | 412 | 391 | 730 | 606 | 645 | 675
Family Residential Real Estate 1-4 [Member] |  |  |  |  |  |
Collateral dependent loans | 803 |  | 805 |  |  |
Collateral dependent loans, ACL | 3,357 | 3,288 | 3,028 | 2,920 | 2,899 | 2,752
Multifamily [Member] |  |  |  |  |  |
Collateral dependent loans | 0 |  | 0 |  |  |
Collateral dependent loans, ACL | 2,524 | 2,568 | 2,493 | 2,517 | 2,433 | 2,501
Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |  |
Collateral dependent loans | 9,022 |  | 12,853 |  |  |
Collateral dependent loans, ACL | 5,033 | 5,206 | 4,742 | 5,843 | 5,881 | 5,905
Agriculture Real Estate [Member] |  |  |  |  |  |
Collateral dependent loans | 486 |  | 165 |  |  |
Collateral dependent loans, ACL | 1,214 | 1,218 | 1,625 | 1,692 | 1,630 | 1,584
Commercial Portfolio Segment [Member] |  |  |  |  |  |
Collateral dependent loans | 278 |  | 200 |  |  |
Collateral dependent loans, ACL | 2,014 | 1,784 | 1,153 | 1,125 | 1,152 | 1,170
Agriculture [Member] |  |  |  |  |  |
Collateral dependent loans | 736 |  | 342 |  |  |
Collateral dependent loans, ACL | 1,358 | 1,392 | 1,705 | 1,484 | 1,606 | 1,836
Consumer and Other [Member] |  |  |  |  |  |
Collateral dependent loans | 15 |  | 21 |  |  |
Collateral dependent loans, ACL | 407 | $ 422 | $ 221 | $ 233 | $ 238 | $ 198
Real Estate [Member] |  |  |  |  |  |
Collateral dependent loans | 10,687 |  |  |  |  |
Real Estate [Member] | Construction Real Estate [Member] |  |  |  |  |  |
Collateral dependent loans | 0 |  |  |  |  |
Real Estate [Member] | Family Residential Real Estate 1-4 [Member] |  |  |  |  |  |
Collateral dependent loans | 803 |  |  |  |  |
Real Estate [Member] | Multifamily [Member] |  |  |  |  |  |
Collateral dependent loans | 0 |  |  |  |  |
Real Estate [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |  |
Collateral dependent loans | 9,022 |  |  |  |  |
Real Estate [Member] | Agriculture Real Estate [Member] |  |  |  |  |  |
Collateral dependent loans | 486 |  |  |  |  |
Real Estate [Member] | Commercial Portfolio Segment [Member] |  |  |  |  |  |
Collateral dependent loans | 124 |  |  |  |  |
Real Estate [Member] | Agriculture [Member] |  |  |  |  |  |
Collateral dependent loans | 252 |  |  |  |  |
Real Estate [Member] | Consumer and Other [Member] |  |  |  |  |  |
Collateral dependent loans | 0 |  |  |  |  |
Equipment [Member] |  |  |  |  |  |
Collateral dependent loans | 43 |  |  |  |  |
Equipment [Member] | Construction Real Estate [Member] |  |  |  |  |  |
Collateral dependent loans | 0 |  |  |  |  |
Equipment [Member] | Family Residential Real Estate 1-4 [Member] |  |  |  |  |  |
Collateral dependent loans | 0 |  |  |  |  |
Equipment [Member] | Multifamily [Member] |  |  |  |  |  |
Collateral dependent loans | 0 |  |  |  |  |
Equipment [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |  |
Collateral dependent loans | 0 |  |  |  |  |
Equipment [Member] | Agriculture Real Estate [Member] |  |  |  |  |  |
Collateral dependent loans | 0 |  |  |  |  |
Equipment [Member] | Commercial Portfolio Segment [Member] |  |  |  |  |  |
Collateral dependent loans | 3 |  |  |  |  |
Equipment [Member] | Agriculture [Member] |  |  |  |  |  |
Collateral dependent loans | 40 |  |  |  |  |
Equipment [Member] | Consumer and Other [Member] |  |  |  |  |  |
Collateral dependent loans | 0 |  |  |  |  |
Other [Member] |  |  |  |  |  |
Collateral dependent loans | 541 |  |  |  |  |
Other [Member] | Construction Real Estate [Member] |  |  |  |  |  |
Collateral dependent loans | 0 |  |  |  |  |
Other [Member] | Family Residential Real Estate 1-4 [Member] |  |  |  |  |  |
Collateral dependent loans | 0 |  |  |  |  |
Other [Member] | Multifamily [Member] |  |  |  |  |  |
Collateral dependent loans | 0 |  |  |  |  |
Other [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |  |
Collateral dependent loans | 0 |  |  |  |  |
Other [Member] | Agriculture Real Estate [Member] |  |  |  |  |  |
Collateral dependent loans | 0 |  |  |  |  |
Other [Member] | Commercial Portfolio Segment [Member] |  |  |  |  |  |
Collateral dependent loans | 97 |  |  |  |  |
Other [Member] | Agriculture [Member] |  |  |  |  |  |
Collateral dependent loans | 444 |  |  |  |  |
Collateral Pledged [Member] |  |  |  |  |  |
Collateral dependent loans | 11,271 |  |  |  |  |
Collateral dependent loans, ACL | 177 |  |  |  |  |
Collateral Pledged [Member] | Construction Real Estate [Member] |  |  |  |  |  |
Collateral dependent loans | 0 |  |  |  |  |
Collateral dependent loans, ACL | 0 |  |  |  |  |
Collateral Pledged [Member] | Family Residential Real Estate 1-4 [Member] |  |  |  |  |  |
Collateral dependent loans | 803 |  |  |  |  |
Collateral dependent loans, ACL | 10 |  |  |  |  |
Collateral Pledged [Member] | Multifamily [Member] |  |  |  |  |  |
Collateral dependent loans | 0 |  |  |  |  |
Collateral dependent loans, ACL | 0 |  |  |  |  |
Collateral Pledged [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |  |
Collateral dependent loans | 9,022 |  |  |  |  |
Collateral dependent loans, ACL | 0 |  |  |  |  |
Collateral Pledged [Member] | Agriculture Real Estate [Member] |  |  |  |  |  |
Collateral dependent loans | 486 |  |  |  |  |
Collateral dependent loans, ACL | 0 |  |  |  |  |
Collateral Pledged [Member] | Commercial Portfolio Segment [Member] |  |  |  |  |  |
Collateral dependent loans | 224 |  |  |  |  |
Collateral dependent loans, ACL | 97 |  |  |  |  |
Collateral Pledged [Member] | Agriculture [Member] |  |  |  |  |  |
Collateral dependent loans | 736 |  |  |  |  |
Collateral dependent loans, ACL | 70 |  |  |  |  |
Collateral Pledged [Member] | Consumer and Other [Member] |  |  |  |  |  |
Collateral dependent loans | 0 |  |  |  |  |
Collateral dependent loans, ACL | $ 0 |  |  |  |  |

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