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Earnings per share (Tables) | 3 Months Ended
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Mar. 31, 2016
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | The following is a summary of the basic and diluted earnings per share for the three month periods ended March 31, 2016 and March 31, 2015.
|  | Three Months Ended March 31, |
|  | 2016 |  | 2015 |
Net income available to common shareholders |  | $ | 1,136,863 |  | $ | 308,392 |
Weighted average common shares outstanding |  |  | 5,807,488 |  |  | 2,965,783 |
Effect of dilutive stock options |  |  | 300,599 |  |  | 327,393 |
Diluted shares |  |  | 6,108,087 |  |  | 3,293,176 |
Basic earnings per common share |  | $ | 0.20 |  | $ | 0.10 |
Diluted earnings per common share |  | $ | 0.19 |  | $ | 0.09 |

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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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