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Note 4 - Loans and Allowance for Loan Losses - Carrying Amount of Impaired Loans (Details) - USD ($) $ in Thousands | Mar. 31, 2017 | Dec. 31, 2016
--- | --- | ---
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 | 2,164 | 2,103
Impaired loans with an allowance recorded, Unpaid Principal Balance | 2,164 | 2,103
Impaired loans with an allowance recorded, Related Allowances | 574 | 535
Total impaired loans, Carrying Amount | 2,164 | 2,103
Total impaired loans, Unpaid Principal Balance | 2,164 | 2,103
Total impaired loans, Related Allowance | 574 | 535
Total impaired loans, Carrying Amount | 2,164 | 2,103
Total impaired loans, Unpaid Principal Balance | 2,164 | 2,103
Real Estate [Member] | Construction, Land Development and Other Land 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 | 1,361 | 1,361
Impaired loans with an allowance recorded, Unpaid Principal Balance | 1,361 | 1,361
Impaired loans with an allowance recorded, Related Allowances | 422 | 423
Total impaired loans, Carrying Amount | 1,361 | 1,361
Total impaired loans, Unpaid Principal Balance | 1,361 | 1,361
Total impaired loans, Related Allowance | 422 | 423
Total impaired loans, Carrying Amount | 1,361 | 1,361
Total impaired loans, Unpaid Principal Balance | 1,361 | 1,361
Real Estate [Member] | Secured by 1-4 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 | 191 | 193
Impaired loans with an allowance recorded, Unpaid Principal Balance | 191 | 193
Impaired loans with an allowance recorded, Related Allowances | 5 | 5
Total impaired loans, Carrying Amount | 191 | 193
Total impaired loans, Unpaid Principal Balance | 191 | 193
Total impaired loans, Related Allowance | 5 | 5
Total impaired loans, Carrying Amount | 191 | 193
Total impaired loans, Unpaid Principal Balance | 191 | 193
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 with an allowance recorded, Related Allowances |  |
Total impaired loans, Carrying Amount |  |
Total impaired loans, Unpaid Principal Balance |  |
Total impaired loans, Related Allowance |  |
Total impaired loans, Carrying Amount |  |
Total impaired loans, Unpaid Principal Balance |  |
Real Estate [Member] | Secured by Non-farm, Non-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 | 542 | 549
Impaired loans with an allowance recorded, Unpaid Principal Balance | 542 | 549
Impaired loans with an allowance recorded, Related Allowances | 102 | 107
Total impaired loans, Carrying Amount | 542 | 549
Total impaired loans, Unpaid Principal Balance | 542 | 549
Total impaired loans, Related Allowance | 102 | 107
Total impaired loans, Carrying Amount | 542 | 549
Total impaired loans, Unpaid Principal Balance | 542 | 549
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 | 70 |
Impaired loans with an allowance recorded, Unpaid Principal Balance | 70 |
Impaired loans with an allowance recorded, Related Allowances | 45 |
Total impaired loans, Carrying Amount | 70 |
Total impaired loans, Unpaid Principal Balance | 70 |
Total impaired loans, Related Allowance | 45 |
Total impaired loans, Carrying Amount | 70 |
Total impaired loans, Unpaid Principal Balance | $ 70 |

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- Definition 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953550-111524 + Details
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X
- Definition Amount of allowance for credit losses related to recorded investment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524 + Details
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- Definition Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524 + Details
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- Definition Amount of investment in impaired financing receivables for which there is no related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953550-111524 + Details
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- Definition Amount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524 + Details
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