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Note 9 - Basic and Diluted Earnings Per Common Share (Tables) | 9 Months Ended
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Sep. 30, 2016
Notes Tables |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Three months ended September 30, |  |  | Nine months ended September 30, |
|  | 2016 |  |  | 2015 |  |  | 2016 |  |  | 2015 |
Numerator for basic and diluted earnings per common share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income for the period |  | $ | 4,741,279 |  |  | $ | 3,159,457 |  |  | $ | 13,250,303 |  |  | $ | 8,278,395 |
Denominator for basic and diluted earnings per scommon share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic weighted average number of common shares outstanding |  |  | 10,432,763 |  |  |  | 10,984,869 |  |  |  | 10,549,056 |  |  |  | 11,057,634 |
Effect of outstanding stock options |  |  | 186,242 |  |  |  | 387,813 |  |  |  | 187,719 |  |  |  | 412,023 |
Diluted weighted average number of shares outstanding |  |  | 10,619,005 |  |  |  | 11,372,682 |  |  |  | 10,736,775 |  |  |  | 11,469,657 |
Basic earnings per common share |  | $ | 0.45 |  |  | $ | 0.29 |  |  | $ | 1.26 |  |  | $ | 0.75 |
Diluted earnings per common share |  | $ | 0.45 |  |  | $ | 0.28 |  |  | $ | 1.23 |  |  | $ | 0.72 |

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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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