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Note 14 - Earnings Per Common Share (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Year ended December 31, 201 7 |  |  | Year ended December 31, 201 6 |  |  | Year ended December 31, 201 5 |
Numerator for basic and diluted earnings per common share: |  |  |  |  |  |  |  |  |  |  |  |
Net income for the year |  | $ | 22,326,594 |  |  | $ | 16,067,154 |  |  | $ | 11,373,730 |
Denominator for basic and diluted earnings per common share: |  |  |  |  |  |  |  |  |  |  |  |
Basic weighted average number of common shares outstanding |  |  | 10,537,356 |  |  |  | 10,524,856 |  |  |  | 10,968,500 |
Effect of stock options |  |  | 256,266 |  |  |  | 188,739 |  |  |  | 391,584 |
Diluted weighted average number of shares outstanding |  |  | 10,793,622 |  |  |  | 10,713,595 |  |  |  | 11,360,084 |
Basic earnings per common share |  | $ | 2.12 |  |  | $ | 1.53 |  |  | $ | 1.04 |
Diluted earnings per common share |  | $ | 2.07 |  |  | $ | 1.50 |  |  | $ | 1.00 |

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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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