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Note 4 - Allowance for Loan Losses - Impaired Loans and Related Allowances (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018
Impaired loans, unpaid principal balance | $ 1,879 | $ 4,698 | $ 3,546
Impaired loans, recorded investment with no allowance | 1,198 | 4,481 | 2,802
Impaired loans, recorded investment with allowance | 577 |  | 634
Impaired loans, total recorded investment | 1,775 | 4,481 | 3,436
Impaired loans, related allowance | 101 |  | 243
Impaired loans, average recorded investment | 2,242 | 3,568 | 3,455
Impaired loans, interest income recognized | 6 | 87 | 85
Real Estate 1 [Member] | Construction and Land Development [Member] |  |  |
Impaired loans, unpaid principal balance | 410 | 984 | 336
Impaired loans, recorded investment with no allowance |  | 865 |
Impaired loans, recorded investment with allowance | 391 |  | 327
Impaired loans, total recorded investment | 391 | 865 | 327
Impaired loans, related allowance | 46 |  | 71
Impaired loans, average recorded investment | 360 | 1,063 | 758
Impaired loans, interest income recognized | 1 | 27 | 12
Real Estate 1 [Member] | Secured by Multi-family Residential Properties [Member] |  |  |
Impaired loans, unpaid principal balance | 941 | 1,415 | 720
Impaired loans, recorded investment with no allowance | 715 | 1,330 | 356
Impaired loans, recorded investment with allowance | 151 |  | 307
Impaired loans, total recorded investment | 866 | 1,330 | 663
Impaired loans, related allowance | 20 |  | 172
Impaired loans, average recorded investment | 802 | 1,300 | 966
Impaired loans, interest income recognized | 2 | 28 | 22
Real Estate 1 [Member] | Other Real Estate Loans [Member] |  |  |
Impaired loans, unpaid principal balance | 528 | 2,029 | 2,290
Impaired loans, recorded investment with no allowance | 483 | 2,029 | 2,249
Impaired loans, recorded investment with allowance | 35 |  |
Impaired loans, total recorded investment | 518 | 2,029 | 2,249
Impaired loans, related allowance | 35 |  |
Impaired loans, average recorded investment | 1,035 | 1,140 | 1,585
Impaired loans, interest income recognized | 3 | 30 | 51
Commercial and Industrial Loans [Member] |  |  |
Impaired loans, unpaid principal balance |  | 270 | 200
Impaired loans, recorded investment with no allowance |  | 257 | 197
Impaired loans, recorded investment with allowance |  |  |
Impaired loans, total recorded investment |  | 257 | 197
Impaired loans, related allowance |  |  |
Impaired loans, average recorded investment | 45 | 65 | 146
Impaired loans, interest income recognized |  | $ 2 |

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- Definition Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5258-111524 + Details
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- Definition Amount of interest income recognized on a cash-basis method of accounting that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524 + Details
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