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Note 15 - Earnings Per Common Share (Tables) | 12 Months Ended
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Dec. 31, 2015
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Year ended December 31, 2015 |  |  | Year ended December 31, 2014 |  |  | Year ended December 31, 2013 |
Numerator for basic and diluted earnings per common share: |  |  |  |  |  |  |  |  |  |  |  |
Net income for the year |  | $ | 11,373,730 |  |  | $ | 6,374,096 |  |  | $ | 4,180,464 |
Denominator for basic and diluted earnings per common share: |  |  |  |  |  |  |  |  |  |  |  |
Basic weighted average number of common shares outstanding |  |  | 10,968,500 |  |  |  | 11,220,874 |  |  |  | 10,468,250 |
Effect of stock options |  |  | 391,584 |  |  |  | 509,524 |  |  |  | 813,159 |
Diluted weighted average number of shares outstanding |  |  | 11,360,084 |  |  |  | 11,730,398 |  |  |  | 11,281,409 |
Basic earnings per common share |  | $ | 1.04 |  |  | $ | 0.57 |  |  | $ | 0.40 |
Diluted earnings per common share |  | $ | 1.00 |  |  | $ | 0.54 |  |  | $ | 0.37 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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