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Note 5 - Loans and Allowance for Loan Losses - Impaired Loans (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2019 | Dec. 31, 2018
Impaired loans with no related allowance recorded, carrying amount | $ 1,666 | $ 708
Impaired loans with no related allowance recorded, unpaid principal balance | 1,666 | 708
Impaired loans with an allowance recorded, carrying amount | 548 | 831
Impaired loans with an allowance recorded, unpaid principal balance | 548 | 831
Impaired loans, related allowances | 196 | 166
Impaired loans, carrying amount | 2,214 | 1,539
Impaired loans, unpaid principal balance | 2,214 | 1,539
Impaired loans, average recorded investment | 1,700 | 1,460
Impaired loans, interest income recognized | 30 | 65
Impaired loans, interest income received | 23 | 67
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] |  |
Impaired loans with no related allowance recorded, carrying amount | 73 | 73
Impaired loans with no related allowance recorded, unpaid principal balance | 73 | 73
Impaired loans with an allowance recorded, carrying amount | 421 | 153
Impaired loans with an allowance recorded, unpaid principal balance | 421 | 153
Impaired loans, related allowances | 98 | 28
Impaired loans, carrying amount | 494 | 226
Impaired loans, unpaid principal balance | 494 | 226
Impaired loans, average recorded investment | 90 | 70
Impaired loans, interest income recognized | 4 | 8
Impaired loans, interest income received | 3 | 8
Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] |  |
Impaired loans with no related allowance recorded, carrying amount | 1,083 | 635
Impaired loans with no related allowance recorded, unpaid principal balance | 1,083 | 635
Impaired loans with an allowance recorded, carrying amount | 23 | 57
Impaired loans with an allowance recorded, unpaid principal balance | 23 | 57
Impaired loans, related allowances | 16 | 50
Impaired loans, carrying amount | 1,106 | 692
Impaired loans, unpaid principal balance | 1,106 | 692
Impaired loans, average recorded investment | 765 | 794
Impaired loans, interest income recognized | 14 | 16
Impaired loans, interest income received | 10 | 16
Real Estate [Member] | Secured by Multi-family Residential Properties [Member] |  |
Impaired loans with no related allowance recorded, carrying amount |  |
Impaired loans with no related allowance recorded, unpaid principal balance |  |
Impaired loans with an allowance recorded, carrying amount |  |
Impaired loans with an allowance recorded, unpaid principal balance |  |
Impaired loans, related allowances |  |
Impaired loans, carrying amount |  |
Impaired loans, unpaid principal balance |  |
Impaired loans, average recorded investment |  |
Impaired loans, interest income recognized |  |
Impaired loans, interest income received |  |
Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member] |  |
Impaired loans with no related allowance recorded, carrying amount | 510 |
Impaired loans with no related allowance recorded, unpaid principal balance | 510 |
Impaired loans with an allowance recorded, carrying amount |  | 511
Impaired loans with an allowance recorded, unpaid principal balance |  | 511
Impaired loans, related allowances |  | 1
Impaired loans, carrying amount | 510 | 511
Impaired loans, unpaid principal balance | 510 | 511
Impaired loans, average recorded investment | 734 | 523
Impaired loans, interest income recognized | 9 | 34
Impaired loans, interest income received | 7 | 35
Real Estate [Member] | Other Real Estate Loans [Member] |  |
Impaired loans, average recorded investment |  | 1
Impaired loans, interest income recognized |  |
Impaired loans, interest income received |  |
Commercial and Industrial Loans [Member] |  |
Impaired loans with no related allowance recorded, carrying amount |  |
Impaired loans with no related allowance recorded, unpaid principal balance |  |
Impaired loans with an allowance recorded, carrying amount | 66 | 67
Impaired loans with an allowance recorded, unpaid principal balance | 66 | 67
Impaired loans, related allowances | 66 | 67
Impaired loans, carrying amount | 66 | 67
Impaired loans, unpaid principal balance | 66 | 67
Impaired loans, average recorded investment | 66 | 57
Impaired loans, interest income recognized | 2 | 4
Impaired loans, interest income received | 2 | 5
Consumer Portfolio Segment [Member] |  |
Impaired loans with no related allowance recorded, carrying amount |  |
Impaired loans with no related allowance recorded, unpaid principal balance |  |
Impaired loans with an allowance recorded, carrying amount | 38 | 43
Impaired loans with an allowance recorded, unpaid principal balance | 38 | 43
Impaired loans, related allowances | 16 | 20
Impaired loans, carrying amount | 38 | 43
Impaired loans, unpaid principal balance | 38 | 43
Impaired loans, average recorded investment | 45 | 15
Impaired loans, interest income recognized | 1 | 3
Impaired loans, interest income received | $ 1 | $ 3

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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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