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Note 12 - Share-based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2016
Notes Tables |
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] |
|  | Number of Shares Awarded (1) |  |  | Weighted Average Grant Date Fair Value (1) |
Unvested at December 31, 2013 |  |  | 28,182 |  |  | $ | 12.60 |
Granted |  |  | 73,558 |  |  | $ | 13.21 |
Vested |  |  | (22,532 | ) |  | $ | 11.76 |
Unvested at December 31, 2014 |  |  | 79,208 |  |  | $ | 12.79 |
Granted |  |  | 12,700 |  |  | $ | 16.85 |
Vested |  |  | (32,015 | ) |  | $ | 13.14 |
Forfeited |  |  | (4,039 | ) |  | $ | 14.36 |
Unvested at December 31, 2015 |  |  | 55,854 |  |  | $ | 12.83 |
Granted |  |  | 58,084 |  |  | $ | 15.25 |
Vested |  |  | (8,161 | ) |  | $ | 14.79 |
Forfeited |  |  | (70,513 | ) |  | $ | 14.67 |
Unvested at December 31, 2016 |  |  | 35,264 |  |  | $ | 12.84 |

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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + 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)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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