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Note 14 - Stock Option Grants (Tables) | 12 Months Ended
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Dec. 31, 2016
Notes Tables |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | 2016 |  |  | 2015 |
Risk-free interest rate |  |  | 1.58 | % |  |  | 1.52 | %
Expected term |  |  | 7.5 years |  |  |  | 7.5 years |
Expected stock price volatility |  |  | 25.25 | % |  |  | 54.04 | %
Dividend yield |  |  | 1.50 | % |  |  | 1.50 | %
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] |
|  | December 31, 2016 |  |  | December 31, 2015 |
|  | Number of Shares |  |  | Average Exercise Price |  |  | Number of Shares |  |  | Average Exercise Price |
Options: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding, beginning of year |  |  | 175,550 |  |  | $ | 8.17 |  |  |  | 83,400 |  |  | $ | 8.09 |
Granted |  |  | 97,000 |  |  |  | 8.30 |  |  |  | 96,150 |  |  |  | 8.23 |
Exercised |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Expired |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Forfeited |  |  | — |  |  |  | — |  |  |  | 4,000 |  |  |  | 8.08 |
Options outstanding, end of year |  |  | 272,550 |  |  | $ | 8.21 |  |  |  | 175,550 |  |  | $ | 8.17 |
Options exercisable, end of year |  |  | 175,550 |  |  | $ | 8.17 |  |  |  | 80,400 |  |  | $ | 8.09 |

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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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