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Note 5 - Loans Receivable and Credit Disclosures - Impaired Loans (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Impaired financing receivable with no related allowance, recorded investment | $ 3,148 | $ 4,044
Impaired financing receivable with no related allowance, unpaid principal balance | 3,788 | 4,920
Loans with no specific reserve recorded, average recorded investment | 10,442 | 2,497
Loans with no specific reserve recorded, interest income recognized | 517 | 164
Impaired financing receivable with related allowance, recorded investment | 12,125 | 744
Impaired financing receivable with related allowance, unpaid principal balance | 13,205 | 755
Impaired financing receivable, related allowance | 1,819 | 209
Loans with an allowance recorded, average recorded investment | 3,970 | 1,831
Loans with an allowance recorded, interest income recognized | 158 | 1
Impaired financing receivable, recorded investment | 15,273 | 4,788
Impaired financing receivable, unpaid principal balance | 16,993 | 5,675
Loans, average recorded investment | 14,412 | 4,328
Loans, interest income recognized | 675 | 165
Construction Real Estate [Member] |  |
Impaired financing receivable with no related allowance, recorded investment | 167 | 0
Impaired financing receivable with no related allowance, unpaid principal balance | 167 | 0
Loans with no specific reserve recorded, average recorded investment | 66 | 0
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 | 167 | 0
Impaired financing receivable, unpaid principal balance | 167 | 0
Loans, average recorded investment | 66 | 0
Loans, interest income recognized | 0 | 0
Family Residential Real Estate 1-4 [Member] |  |
Impaired financing receivable with no related allowance, recorded investment | 416 | 460
Impaired financing receivable with no related allowance, unpaid principal balance | 475 | 796
Loans with no specific reserve recorded, average recorded investment | 318 | 336
Loans with no specific reserve recorded, interest income recognized | 0 | 31
Impaired financing receivable with related allowance, recorded investment | 924 | 744
Impaired financing receivable with related allowance, unpaid principal balance | 1,278 | 755
Impaired financing receivable, related allowance | 150 | 209
Loans with an allowance recorded, average recorded investment | 935 | 329
Loans with an allowance recorded, interest income recognized | 66 | 0
Impaired financing receivable, recorded investment | 1,340 | 1,204
Impaired financing receivable, unpaid principal balance | 1,753 | 1,551
Loans, average recorded investment | 1,253 | 665
Loans, interest income recognized | 66 | 31
Commercial Real Estate Portfolio Segment [Member] |  |
Impaired financing receivable with no related allowance, recorded investment | 242 | 83
Impaired financing receivable with no related allowance, unpaid principal balance | 578 | 435
Loans with no specific reserve recorded, average recorded investment | 6,625 | 323
Loans with no specific reserve recorded, interest income recognized | 16 | 133
Impaired financing receivable with related allowance, recorded investment | 10,016 | 0
Impaired financing receivable with related allowance, unpaid principal balance | 10,157 | 0
Impaired financing receivable, related allowance | 1,486 | 0
Loans with an allowance recorded, average recorded investment | 2,198 | 0
Loans with an allowance recorded, interest income recognized | 0 | 0
Impaired financing receivable, recorded investment | 10,258 | 83
Impaired financing receivable, unpaid principal balance | 10,735 | 435
Loans, average recorded investment | 8,823 | 323
Loans, interest income recognized | 16 | 133
Agriculture Real Estate [Member] |  |
Impaired financing receivable with no related allowance, recorded investment | 1,664 | 84
Impaired financing receivable with no related allowance, unpaid principal balance | 1,698 | 97
Loans with no specific reserve recorded, average recorded investment | 1,295 | 80
Loans with no specific reserve recorded, interest income recognized | 6 | 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 | 1,664 | 84
Impaired financing receivable, unpaid principal balance | 1,698 | 97
Loans, average recorded investment | 1,295 | 80
Loans, interest income recognized | 6 | 0
Commercial Portfolio Segment [Member] |  |
Impaired financing receivable with no related allowance, recorded investment | 274 | 462
Impaired financing receivable with no related allowance, unpaid principal balance | 318 | 517
Loans with no specific reserve recorded, average recorded investment | 524 | 285
Loans with no specific reserve recorded, interest income recognized | 23 | 0
Impaired financing receivable with related allowance, recorded investment | 666 | 0
Impaired financing receivable with related allowance, unpaid principal balance | 1,247 | 0
Impaired financing receivable, related allowance | 115 | 0
Loans with an allowance recorded, average recorded investment | 418 | 1,494
Loans with an allowance recorded, interest income recognized | 0 | 0
Impaired financing receivable, recorded investment | 940 | 462
Impaired financing receivable, unpaid principal balance | 1,565 | 517
Loans, average recorded investment | 942 | 1,779
Loans, interest income recognized | 23 | 0
Agriculture [Member] |  |
Impaired financing receivable with no related allowance, recorded investment | 377 | 2,951
Impaired financing receivable with no related allowance, unpaid principal balance | 542 | 3,071
Loans with no specific reserve recorded, average recorded investment | 1,592 | 1,472
Loans with no specific reserve recorded, interest income recognized | 344 | 0
Impaired financing receivable with related allowance, recorded investment | 482 | 0
Impaired financing receivable with related allowance, unpaid principal balance | 484 | 0
Impaired financing receivable, related allowance | 40 | 0
Loans with an allowance recorded, average recorded investment | 400 | 0
Loans with an allowance recorded, interest income recognized | 0 | 0
Impaired financing receivable, recorded investment | 859 | 2,951
Impaired financing receivable, unpaid principal balance | 1,026 | 3,071
Loans, average recorded investment | 1,992 | 1,472
Loans, interest income recognized | 344 | 0
Consumer and Other [Member] |  |
Impaired financing receivable with no related allowance, recorded investment | 8 | 4
Impaired financing receivable with no related allowance, unpaid principal balance | 10 | 4
Loans with no specific reserve recorded, average recorded investment | 22 | 1
Loans with no specific reserve recorded, interest income recognized | 128 | 0
Impaired financing receivable with related allowance, recorded investment | 37 | 0
Impaired financing receivable with related allowance, unpaid principal balance | 39 | 0
Impaired financing receivable, related allowance | 28 | 0
Loans with an allowance recorded, average recorded investment | 19 | 8
Loans with an allowance recorded, interest income recognized | 92 | 1
Impaired financing receivable, recorded investment | 45 | 4
Impaired financing receivable, unpaid principal balance | 49 | 4
Loans, average recorded investment | 41 | 9
Loans, interest income recognized | $ 220 | $ 1

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