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Note 7 - Loans - Loan Balances and Allowance for Loan Losses for Each Impairment Method (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019 | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | --- | --- | ---
Loans receivable: individually evaluated | $ 8,290 | $ 5,486 |  |
Loans receivable: collectively evaluated | 926,958 | 939,762 |  |
Loans receivable | 1,167,473 | 1,182,222 |  |
Allowance for loan losses: individually evaluated | 2,227 | 1,051 |  |
Allowance for loan losses: collectively evaluated | 8,518 | 8,200 |  |
Allowance for loan losses | 11,330 | 9,836 | $ 8,256 | $ 9,309
Financial Asset Acquired and No Credit Deterioration [Member] |  |  |  |
Loans receivable | 232,225 | 236,974 |  |
Residential Portfolio Segment [Member] |  |  |  |
Loans receivable: individually evaluated | 923 | 1,391 |  |
Loans receivable: collectively evaluated | 474,985 | 476,703 |  |
Loans receivable | 581,626 | 586,580 |  |
Allowance for loan losses: individually evaluated | 194 | 176 |  |
Allowance for loan losses: collectively evaluated | 4,189 | 4,006 |  |
Allowance for loan losses | 4,383 | 4,182 | 3,991 | 3,986
Residential Portfolio Segment [Member] | Financial Asset Acquired and No Credit Deterioration [Member] |  |  |  |
Loans receivable | 105,718 | 108,486 |  |
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Senior Lien [Member] |  |  |  |
Loans receivable: individually evaluated | 556 | 1,023 |  |
Loans receivable: collectively evaluated | 405,687 | 405,186 |  |
Loans receivable | 508,387 | 510,641 |  |
Allowance for loan losses: individually evaluated | 0 | 0 |  |
Allowance for loan losses: collectively evaluated | 3,572 | 3,405 |  |
Allowance for loan losses | 3,572 | 3,405 | 3,178 | 3,156
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Senior Lien [Member] | Financial Asset Acquired and No Credit Deterioration [Member] |  |  |  |
Loans receivable | 102,144 | 104,432 |  |
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Junior Lien [Member] |  |  |  |
Loans receivable: individually evaluated | 367 | 368 |  |
Loans receivable: collectively evaluated | 24,755 | 24,730 |  |
Loans receivable | 27,028 | 27,503 |  |
Allowance for loan losses: individually evaluated | 194 | 176 |  |
Allowance for loan losses: collectively evaluated | 220 | 208 |  |
Allowance for loan losses | 414 | 384 | 329 | 325
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Junior Lien [Member] | Financial Asset Acquired and No Credit Deterioration [Member] |  |  |  |
Loans receivable | 1,906 | 2,405 |  |
Residential Portfolio Segment [Member] | Home Equity Line of Credit 1 [Member] |  |  |  |
Loans receivable: individually evaluated | 0 | 0 |  |
Loans receivable: collectively evaluated | 30,580 | 32,147 |  |
Loans receivable | 32,090 | 33,638 |  |
Allowance for loan losses: individually evaluated | 0 | 0 |  |
Allowance for loan losses: collectively evaluated | 278 | 276 |  |
Allowance for loan losses | 278 | 276 | 286 | 302
Residential Portfolio Segment [Member] | Home Equity Line of Credit 1 [Member] | Financial Asset Acquired and No Credit Deterioration [Member] |  |  |  |
Loans receivable | 1,510 | 1,491 |  |
Residential Portfolio Segment [Member] | Construction Loans [Member] |  |  |  |
Loans receivable: individually evaluated | 0 | 0 |  |
Loans receivable: collectively evaluated | 13,963 | 14,640 |  |
Loans receivable | 14,121 | 14,798 |  |
Allowance for loan losses: individually evaluated | 0 | 0 |  |
Allowance for loan losses: collectively evaluated | 119 | 117 |  |
Allowance for loan losses | 119 | 117 | 198 | 203
Residential Portfolio Segment [Member] | Construction Loans [Member] | Financial Asset Acquired and No Credit Deterioration [Member] |  |  |  |
Loans receivable | 158 | 158 |  |
Commercial Portfolio Segment [Member] |  |  |  |
Loans receivable: individually evaluated | 7,367 | 4,095 |  |
Loans receivable: collectively evaluated | 435,457 | 446,318 |  |
Loans receivable | 569,331 | 578,901 |  |
Allowance for loan losses: individually evaluated | 2,033 | 875 |  |
Allowance for loan losses: collectively evaluated | 4,056 | 3,913 |  |
Allowance for loan losses | 6,089 | 4,788 | 3,444 | 4,591
Commercial Portfolio Segment [Member] | Financial Asset Acquired and No Credit Deterioration [Member] |  |  |  |
Loans receivable | 126,507 | 128,488 |  |
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] |  |  |  |
Loans receivable: individually evaluated | 714 | 684 |  |
Loans receivable: collectively evaluated | 193,507 | 198,532 |  |
Loans receivable | 295,860 | 301,227 |  |
Allowance for loan losses: individually evaluated | 0 | 0 |  |
Allowance for loan losses: collectively evaluated | 1,932 | 1,921 |  |
Allowance for loan losses | 1,932 | 1,921 | 1,887 | 2,538
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Financial Asset Acquired and No Credit Deterioration [Member] |  |  |  |
Loans receivable | 101,639 | 102,011 |  |
Commercial Portfolio Segment [Member] | Construction Loans [Member] |  |  |  |
Loans receivable: individually evaluated | 1,255 | 1,261 |  |
Loans receivable: collectively evaluated | 29,308 | 29,710 |  |
Loans receivable | 33,340 | 33,555 |  |
Allowance for loan losses: individually evaluated | 674 | 678 |  |
Allowance for loan losses: collectively evaluated | 296 | 288 |  |
Allowance for loan losses | 970 | 966 | 114 | 110
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Financial Asset Acquired and No Credit Deterioration [Member] |  |  |  |
Loans receivable | 2,777 | 2,584 |  |
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] |  |  |  |
Loans receivable: individually evaluated | 4,974 | 1,467 |  |
Loans receivable: collectively evaluated | 124,917 | 122,313 |  |
Loans receivable | 132,308 | 126,374 |  |
Allowance for loan losses: individually evaluated | 1,325 | 149 |  |
Allowance for loan losses: collectively evaluated | 1,320 | 1,242 |  |
Allowance for loan losses | 2,645 | 1,391 | 1,069 | 1,553
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Financial Asset Acquired and No Credit Deterioration [Member] |  |  |  |
Loans receivable | 2,417 | 2,594 |  |
Commercial Portfolio Segment [Member] | Political Subdivisions [Member] |  |  |  |
Loans receivable: individually evaluated | 0 | 0 |  |
Loans receivable: collectively evaluated | 43,613 | 53,570 |  |
Loans receivable | 43,613 | 53,570 |  |
Allowance for loan losses: individually evaluated | 0 | 0 |  |
Allowance for loan losses: collectively evaluated | 0 | 0 |  |
Allowance for loan losses | 0 | 0 |  |
Commercial Portfolio Segment [Member] | Political Subdivisions [Member] | Financial Asset Acquired and No Credit Deterioration [Member] |  |  |  |
Loans receivable | 0 | 0 |  |
Commercial Portfolio Segment [Member] | Loans Secured by Farmland [Member] |  |  |  |
Loans receivable: individually evaluated | 424 | 607 |  |
Loans receivable: collectively evaluated | 10,845 | 11,386 |  |
Loans receivable | 11,524 | 12,251 |  |
Allowance for loan losses: individually evaluated | 34 | 48 |  |
Allowance for loan losses: collectively evaluated | 110 | 110 |  |
Allowance for loan losses | 144 | 158 | 98 | 102
Commercial Portfolio Segment [Member] | Loans Secured by Farmland [Member] | Financial Asset Acquired and No Credit Deterioration [Member] |  |  |  |
Loans receivable | 255 | 258 |  |
Commercial Portfolio Segment [Member] | Multifamily 5 or More Residential [Member] |  |  |  |
Loans receivable: individually evaluated | 0 | 0 |  |
Loans receivable: collectively evaluated | 13,517 | 10,617 |  |
Loans receivable | 32,370 | 31,070 |  |
Allowance for loan losses: individually evaluated | 0 | 0 |  |
Allowance for loan losses: collectively evaluated | 199 | 156 |  |
Allowance for loan losses | 199 | 156 | 112 | 114
Commercial Portfolio Segment [Member] | Multifamily 5 or More Residential [Member] | Financial Asset Acquired and No Credit Deterioration [Member] |  |  |  |
Loans receivable | 18,853 | 20,453 |  |
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] |  |  |  |
Loans receivable: individually evaluated | 0 | 76 |  |
Loans receivable: collectively evaluated | 3,886 | 4,243 |  |
Loans receivable | 3,886 | 4,319 |  |
Allowance for loan losses: individually evaluated | 0 | 0 |  |
Allowance for loan losses: collectively evaluated | 39 | 41 |  |
Allowance for loan losses | 39 | 41 | 43 | 46
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Financial Asset Acquired and No Credit Deterioration [Member] |  |  |  |
Loans receivable | 0 | 0 |  |
Commercial Portfolio Segment [Member] | Other Commercial Loans [Member] |  |  |  |
Loans receivable: individually evaluated | 0 | 0 |  |
Loans receivable: collectively evaluated | 15,864 | 15,947 |  |
Loans receivable | 16,430 | 16,535 |  |
Allowance for loan losses: individually evaluated | 0 | 0 |  |
Allowance for loan losses: collectively evaluated | 160 | 155 |  |
Allowance for loan losses | 160 | 155 | 121 | 128
Commercial Portfolio Segment [Member] | Other Commercial Loans [Member] | Financial Asset Acquired and No Credit Deterioration [Member] |  |  |  |
Loans receivable | 566 | 588 |  |
Consumer Portfolio Segment [Member] |  |  |  |
Loans receivable: individually evaluated | 0 | 0 |  |
Loans receivable: collectively evaluated | 16,516 | 16,741 |  |
Loans receivable | 16,516 | 16,741 |  |
Allowance for loan losses: individually evaluated | 0 | 0 |  |
Allowance for loan losses: collectively evaluated | 273 | 281 |  |
Allowance for loan losses | 273 | 281 | 236 | 233
Consumer Portfolio Segment [Member] | Financial Asset Acquired and No Credit Deterioration [Member] |  |  |  |
Loans receivable | 0 | 0 |  |
Unallocated Financing Receivables [Member] |  |  |  |
Loans receivable: individually evaluated | 0 | 0 |  |
Loans receivable: collectively evaluated | 0 | 0 |  |
Loans receivable | 0 | 0 |  |
Allowance for loan losses: individually evaluated | 0 | 0 |  |
Allowance for loan losses: collectively evaluated |  |  |  |
Allowance for loan losses | $ 585 | $ 585 | $ 585 | $ 499

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