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Note 9 - Basic and Diluted Earnings Per Common Share (Tables) | 3 Months Ended
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Mar. 31, 2017
Notes Tables |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Three months ended March 31, |
|  | 2017 |  |  | 2016 |
Numerator for basic and diluted earnings per common share: |  |  |  |  |  |  |  |
Net income for the period |  | $ | 2,446,491 |  |  | $ | 4,438,238 |
Denominator for basic and diluted earnings per scommon share: |  |  |  |  |  |  |  |
Basic weighted average number of common shares outstanding |  |  | 10,474,647 |  |  |  | 10,674,036 |
Effect of outstanding stock options |  |  | 301,868 |  |  |  | 187,546 |
Diluted weighted average number of shares outstanding |  |  | 10,776,515 |  |  |  | 10,861,582 |
Basic earnings per common share |  | $ | 0.23 |  |  | $ | 0.42 |
Diluted earnings per common share |  | $ | 0.23 |  |  | $ | 0.41 |

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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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