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Note 10 - Stock Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2019
Notes Tables |
Nonvested Restricted Stock Shares Activity [Table Text Block] |
Non-vested Shares |  | Shares |  |  | Weighted Average Grant Date Fair Value |
Non-vested at January 1, 2018 |  |  | 30,690 |  |  | $ | 28.51 |
Granted |  |  | 4,433 |  |  |  | 43.50 |
Vested |  |  | (7,700 | ) |  |  | 22.64 |
Forfeited |  |  | - |  |  |  | - |
Non-vested at December 31, 2018 |  |  | 27,423 |  |  | $ | 32.58 |
Non-vested at January 1, 2019 |  |  | 27,423 |  |  | $ | 32.58 |
Granted |  |  | 7,407 |  |  |  | 43.00 |
Vested |  |  | (4,625 | ) |  |  | 29.37 |
Forfeited |  |  | - |  |  |  | - |
Non-vested at September 30, 2019 |  |  | 30,205 |  |  | $ | 35.63 |

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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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