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Note 16 - Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] |
|  |  |  |  |  | Fair Value Measurements at December 31, 20 17 Using |
Description |  | Balance as of December 31, 2017 |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
U.S. Government agencies and corporations |  | $ | 307,719 |  |  | $ | --- |  |  | $ | 307,719 |  |  | $ | --- |
States and political subdivisions |  |  | 16,834 |  |  |  | --- |  |  |  | 16,834 |  |  |  | --- |
Mortgage-backed securities |  |  | 659 |  |  |  | --- |  |  |  | 659 |  |  |  | --- |
Corporate debt securities |  |  | 6,175 |  |  |  | --- |  |  |  | 6,175 |  |  |  | --- |
Total securities available for sale |  | $ | 331,387 |  |  | $ | --- |  |  | $ | 331,387 |  |  | $ | --- |
|  |  |  |  |  | Fair Value Measurements at December 31, 20 16 Using |
Description |  | Balance as of December 31, 2016 |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
U.S. Government agencies and corporations |  | $ | 285,598 |  |  | $ | --- |  |  | $ | 285,598 |  |  | $ | --- |
States and political subdivisions |  |  | 11,693 |  |  |  | --- |  |  |  | 11,693 |  |  |  | --- |
Mortgage-backed securities |  |  | 930 |  |  |  | --- |  |  |  | 930 |  |  |  | --- |
Corporate debt securities |  |  | 5,898 |  |  |  | --- |  |  |  | 5,898 |  |  |  | --- |
Other securities |  |  | 163 |  |  |  | --- |  |  |  | 163 |  |  |  | --- |
Total securities available for sale |  | $ | 304,282 |  |  | $ | --- |  |  | $ | 304,282 |  |  | $ | --- |
Fair Value Measurements, Nonrecurring [Table Text Block] |
|  |  |  |  |  |  |  | Carrying value |
Date |  | Description |  | Balance |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
|  | Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
December 31, 201 7 |  | Impaired loans net of valuation allowance |  | $ | 1,303 |  |  | $ | --- |  |  | $ | --- |  |  | $ | 1,303 |
December 31, 201 6 |  | Impaired loans net of valuation allowance |  |  | 878 |  |  |  | --- |  |  |  | --- |  |  |  | 878 |
|  |  |  |  |  |  |  | Carrying Value |
Date |  | Description |  | Balance |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
|  | Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
December 31, 201 7 |  | Other real estate owned net of valuation allowance |  | $ | 2,817 |  |  | $ | --- |  |  | $ | --- |  |  | $ | 2,817 |
December 31, 201 6 |  | Other real estate owned net of valuation allowance |  |  | 3,156 |  |  |  | --- |  |  |  | --- |  |  |  | 3,156 |
Fair Value Inputs, Assets, Quantitative Information [Table Text Block] |
Impaired Loans |  | Valuation Technique |  | Unobservable Input |  | Range (Weighted Average) |
December 31, 2017 |  | Present value of cash flows |  | Discount rate |  | 5.50% | - | 13.25% | (5.92%) |
December 31, 2016 |  | Present value of cash flows |  | Discount rate |  | 6.75% | - | 8.00% | (7.35%) |
|  | Valuation Technique |  | Unobservable Input |  | Rang (Weighted Average) |
Other real estate owned |  | Discounted appraised value |  | Selling cost |  | 2.00% (1) | – | 6.01% | (4.72%) |
Other real estate owned |  | Discounted appraised value |  | Discount for lack of marketability and age of appraisal |  | 1.68% | – | 68.33% | (11.07%) |
|  | Valuation Technique |  | Unobservable Input |  | Range (Weighted Average) |
Other real estate owned |  | Discounted appraised value |  | Selling cost |  | 2.91% (1) | – | 8.60% | (6.48%) |
Other real estate owned |  | Discounted appraised value |  | Discount for lack of marketability and age of appraisal |  | 0% | – | 53.46% | (13.66%) |
Fair Value, by Balance Sheet Grouping [Table Text Block] |
|  | December 31, 2017 |
|  |  |  |  |  | Estimated Fair Value |
|  | Carrying Amount |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Financial assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and due from banks |  | $ | 12,926 |  |  | $ | 12,926 |  |  | $ | --- |  |  | $ | --- |
Interest-bearing deposits |  |  | 51,233 |  |  |  | 51,233 |  |  |  | --- |  |  |  | --- |
Securities |  |  | 458,551 |  |  |  | --- |  |  |  | 461,500 |  |  |  | --- |
Restricted securities |  |  | 1,200 |  |  |  | --- |  |  |  | 1,200 |  |  |  | --- |
Mortgage loans held for sale |  |  | 260 |  |  |  | --- |  |  |  | 260 |  |  |  | --- |
Loans, net |  |  | 660,144 |  |  |  | --- |  |  |  | --- |  |  |  | 656,399 |
Accrued interest receivable |  |  | 5,297 |  |  |  | --- |  |  |  | 5,297 |  |  |  | --- |
Bank-owned life insurance |  |  | 33,756 |  |  |  | --- |  |  |  | 33,756 |  |  |  | --- |
Financial liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deposits |  | $ | 1,059,734 |  |  | $ | --- |  |  | $ | 944,850 |  |  | $ | 113,053 |
Accrued interest payable |  |  | 62 |  |  |  | --- |  |  |  | 62 |  |  |  | --- |
|  | December 31, 201 6 |
|  |  |  |  |  | Estimated Fair Value |
|  | Carrying Amount |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Financial assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and due from banks |  | $ | 13,974 |  |  | $ | 13,974 |  |  | $ | --- |  |  | $ | --- |
Interest-bearing deposits |  |  | 80,268 |  |  |  | 80,268 |  |  |  | --- |  |  |  | --- |
Securities |  |  | 439,239 |  |  |  | --- |  |  |  | 441,974 |  |  |  | --- |
Restricted securities |  |  | 1,170 |  |  |  | --- |  |  |  | 1,170 |  |  |  | --- |
Mortgage loans held for sale |  |  | 478 |  |  |  | --- |  |  |  | 478 |  |  |  | --- |
Loans, net |  |  | 639,452 |  |  |  | --- |  |  |  | --- |  |  |  | 658,386 |
Accrued interest receivable |  |  | 5,260 |  |  |  | --- |  |  |  | 5,260 |  |  |  | --- |
Bank-owned life insurance |  |  | 22,998 |  |  |  | --- |  |  |  | 22,998 |  |  |  | --- |
Financial liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deposits |  | $ | 1,043,442 |  |  | $ | --- |  |  | $ | 912,828 |  |  | $ | 128,690 |
Accrued interest payable |  |  | 55 |  |  |  | --- |  |  |  | 55 |  |  |  | --- |

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- Definition Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13476-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13467-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=75026489&loc=d3e13220-108610 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14172-108612 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611 + Details
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- Definition Tabular disclosure of quantitative information about the inputs used in the fair value measurement of assets. This disclosure may include, but is not limited to, the fair value of the asset, valuation technique used to measure fair value, the inputs used to measure fair value, the ranges of the inputs, and the weighted averages of the inputs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258 + Details
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