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Note 7 - Loans Receivable and Credit Disclosures - Impaired Loans (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Impaired financing receivable with no related allowance, recorded investment | $ 1,965 | $ 3,148
Impaired financing receivable with no related allowance, unpaid principal balance | 2,323 | 3,788
Impaired financing receivable with related allowance, recorded investment | 10,528 | 12,125
Impaired financing receivable with related allowance, unpaid principal balance | 10,794 | 13,205
Impaired financing receivable, related allowance | 1,539 | 1,819
Impaired financing receivable, recorded investment | 12,493 | 15,273
Impaired financing receivable, unpaid principal balance | 13,117 | 16,993
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
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
Impaired financing receivable, recorded investment | 0 | 167
Impaired financing receivable, unpaid principal balance | 0 | 167
Family Residential Real Estate 1-4 [Member] |  |
Impaired financing receivable with no related allowance, recorded investment | 694 | 416
Impaired financing receivable with no related allowance, unpaid principal balance | 747 | 475
Impaired financing receivable with related allowance, recorded investment | 306 | 924
Impaired financing receivable with related allowance, unpaid principal balance | 316 | 1,278
Impaired financing receivable, related allowance | 40 | 150
Impaired financing receivable, recorded investment | 1,000 | 1,340
Impaired financing receivable, unpaid principal balance | 1,063 | 1,753
Commercial Real Estate Portfolio Segment [Member] |  |
Impaired financing receivable with no related allowance, recorded investment | 127 | 242
Impaired financing receivable with no related allowance, unpaid principal balance | 142 | 578
Impaired financing receivable with related allowance, recorded investment | 9,827 | 10,016
Impaired financing receivable with related allowance, unpaid principal balance | 10,081 | 10,157
Impaired financing receivable, related allowance | 1,326 | 1,486
Impaired financing receivable, recorded investment | 9,954 | 10,258
Impaired financing receivable, unpaid principal balance | 10,223 | 10,735
Agriculture Real Estate [Member] |  |
Impaired financing receivable with no related allowance, recorded investment | 576 | 1,664
Impaired financing receivable with no related allowance, unpaid principal balance | 631 | 1,698
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
Impaired financing receivable, recorded investment | 576 | 1,664
Impaired financing receivable, unpaid principal balance | 631 | 1,698
Commercial Portfolio Segment [Member] |  |
Impaired financing receivable with no related allowance, recorded investment | 238 | 274
Impaired financing receivable with no related allowance, unpaid principal balance | 271 | 318
Impaired financing receivable with related allowance, recorded investment | 57 | 666
Impaired financing receivable with related allowance, unpaid principal balance | 58 | 1,247
Impaired financing receivable, related allowance | 18 | 115
Impaired financing receivable, recorded investment | 295 | 940
Impaired financing receivable, unpaid principal balance | 329 | 1,565
Agriculture [Member] |  |
Impaired financing receivable with no related allowance, recorded investment | 323 | 377
Impaired financing receivable with no related allowance, unpaid principal balance | 523 | 542
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
Impaired financing receivable, recorded investment | 638 | 859
Impaired financing receivable, unpaid principal balance | 838 | 1,026
Consumer and Other [Member] |  |
Impaired financing receivable with no related allowance, recorded investment | 7 | 8
Impaired financing receivable with no related allowance, unpaid principal balance | 9 | 10
Impaired financing receivable with related allowance, recorded investment | 23 | 37
Impaired financing receivable with related allowance, unpaid principal balance | 24 | 39
Impaired financing receivable, related allowance | 23 | 28
Impaired financing receivable, recorded investment | 30 | 45
Impaired financing receivable, unpaid principal balance | $ 33 | $ 49

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