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Note 4 - Loans Receivable and Credit Disclosures - Impaired Loans (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Impaired financing receivable with no related allowance, recorded investment | $ 1,908 | $ 3,148
Impaired financing receivable with no related allowance, unpaid principal balance | 2,680 | 3,788
Loans with no specific reserve recorded, average recorded investment | 2,435 | 10,442
Loans with no specific reserve recorded, interest income recognized | 356 | 517
Impaired financing receivable with related allowance, recorded investment | 10,404 | 12,125
Impaired financing receivable with related allowance, unpaid principal balance | 10,751 | 13,205
Impaired financing receivable, related allowance | 1,392 | 1,819
Loans with an allowance recorded, average recorded investment | 10,805 | 3,970
Loans with an allowance recorded, interest income recognized | 0 | 158
Impaired financing receivable, recorded investment | 12,312 | 15,273
Impaired financing receivable, unpaid principal balance | 13,431 | 16,993
Loans, average recorded investment | 13,240 | 14,412
Loans, interest income recognized | 356 | 675
Construction Real Estate [Member] |  |
Impaired financing receivable with no related allowance, recorded investment | 0 | 167
Impaired financing receivable with no related allowance, unpaid principal balance | 0 | 167
Loans with no specific reserve recorded, average recorded investment | 67 | 66
Loans with no specific reserve recorded, interest income recognized | 0 | 0
Impaired financing receivable with related allowance, recorded investment | 0 | 0
Impaired financing receivable with related allowance, unpaid principal balance | 0 | 0
Impaired financing receivable, related allowance | 0 | 0
Loans with an allowance recorded, average recorded investment | 0 | 0
Loans with an allowance recorded, interest income recognized | 0 | 0
Impaired financing receivable, recorded investment | 0 | 167
Impaired financing receivable, unpaid principal balance | 0 | 167
Loans, average recorded investment | 67 | 66
Loans, interest income recognized | 0 | 0
Family Residential Real Estate 1-4 [Member] |  |
Impaired financing receivable with no related allowance, recorded investment | 677 | 416
Impaired financing receivable with no related allowance, unpaid principal balance | 739 | 475
Loans with no specific reserve recorded, average recorded investment | 605 | 318
Loans with no specific reserve recorded, interest income recognized | 19 | 0
Impaired financing receivable with related allowance, recorded investment | 303 | 924
Impaired financing receivable with related allowance, unpaid principal balance | 314 | 1,278
Impaired financing receivable, related allowance | 40 | 150
Loans with an allowance recorded, average recorded investment | 329 | 935
Loans with an allowance recorded, interest income recognized | 0 | 66
Impaired financing receivable, recorded investment | 980 | 1,340
Impaired financing receivable, unpaid principal balance | 1,053 | 1,753
Loans, average recorded investment | 934 | 1,253
Loans, interest income recognized | 19 | 66
Commercial Real Estate Portfolio Segment [Member] |  |
Impaired financing receivable with no related allowance, recorded investment | 124 | 242
Impaired financing receivable with no related allowance, unpaid principal balance | 142 | 578
Loans with no specific reserve recorded, average recorded investment | 154 | 6,625
Loans with no specific reserve recorded, interest income recognized | 297 | 16
Impaired financing receivable with related allowance, recorded investment | 9,668 | 10,016
Impaired financing receivable with related allowance, unpaid principal balance | 10,001 | 10,157
Impaired financing receivable, related allowance | 1,139 | 1,486
Loans with an allowance recorded, average recorded investment | 9,909 | 2,198
Loans with an allowance recorded, interest income recognized | 0 | 0
Impaired financing receivable, recorded investment | 9,792 | 10,258
Impaired financing receivable, unpaid principal balance | 10,143 | 10,735
Loans, average recorded investment | 10,063 | 8,823
Loans, interest income recognized | 297 | 16
Agriculture Real Estate [Member] |  |
Impaired financing receivable with no related allowance, recorded investment | 546 | 1,664
Impaired financing receivable with no related allowance, unpaid principal balance | 1,001 | 1,698
Loans with no specific reserve recorded, average recorded investment | 901 | 1,295
Loans with no specific reserve recorded, interest income recognized | 25 | 6
Impaired financing receivable with related allowance, recorded investment | 0 | 0
Impaired financing receivable with related allowance, unpaid principal balance | 0 | 0
Impaired financing receivable, related allowance | 0 | 0
Loans with an allowance recorded, average recorded investment | 0 | 0
Loans with an allowance recorded, interest income recognized | 0 | 0
Impaired financing receivable, recorded investment | 546 | 1,664
Impaired financing receivable, unpaid principal balance | 1,001 | 1,698
Loans, average recorded investment | 901 | 1,295
Loans, interest income recognized | 25 | 6
Commercial Portfolio Segment [Member] |  |
Impaired financing receivable with no related allowance, recorded investment | 233 | 274
Impaired financing receivable with no related allowance, unpaid principal balance | 269 | 318
Loans with no specific reserve recorded, average recorded investment | 367 | 524
Loans with no specific reserve recorded, interest income recognized | 0 | 23
Impaired financing receivable with related allowance, recorded investment | 97 | 666
Impaired financing receivable with related allowance, unpaid principal balance | 98 | 1,247
Impaired financing receivable, related allowance | 60 | 115
Loans with an allowance recorded, average recorded investment | 164 | 418
Loans with an allowance recorded, interest income recognized | 0 | 0
Impaired financing receivable, recorded investment | 330 | 940
Impaired financing receivable, unpaid principal balance | 367 | 1,565
Loans, average recorded investment | 531 | 942
Loans, interest income recognized | 0 | 23
Agriculture [Member] |  |
Impaired financing receivable with no related allowance, recorded investment | 322 | 377
Impaired financing receivable with no related allowance, unpaid principal balance | 521 | 542
Loans with no specific reserve recorded, average recorded investment | 335 | 1,592
Loans with no specific reserve recorded, interest income recognized | 15 | 344
Impaired financing receivable with related allowance, recorded investment | 315 | 482
Impaired financing receivable with related allowance, unpaid principal balance | 315 | 484
Impaired financing receivable, related allowance | 132 | 40
Loans with an allowance recorded, average recorded investment | 371 | 400
Loans with an allowance recorded, interest income recognized | 0 | 0
Impaired financing receivable, recorded investment | 637 | 859
Impaired financing receivable, unpaid principal balance | 836 | 1,026
Loans, average recorded investment | 706 | 1,992
Loans, interest income recognized | 15 | 344
Consumer and Other [Member] |  |
Impaired financing receivable with no related allowance, recorded investment | 6 | 8
Impaired financing receivable with no related allowance, unpaid principal balance | 8 | 10
Loans with no specific reserve recorded, average recorded investment | 6 | 22
Loans with no specific reserve recorded, interest income recognized | 0 | 128
Impaired financing receivable with related allowance, recorded investment | 21 | 37
Impaired financing receivable with related allowance, unpaid principal balance | 23 | 39
Impaired financing receivable, related allowance | 21 | 28
Loans with an allowance recorded, average recorded investment | 32 | 19
Loans with an allowance recorded, interest income recognized | 0 | 92
Impaired financing receivable, recorded investment | 27 | 45
Impaired financing receivable, unpaid principal balance | 31 | 49
Loans, average recorded investment | 38 | 41
Loans, interest income recognized | $ 0 | $ 220

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