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Note 15 - Earnings Per 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,
|  | 2013 |  | 2014 |  | 2015
Numerator |  |  |  |  |  |  |  |  |  |  |  |
Net income |  |  | 21,217,193 |  |  |  | 12,685,826 |  |  |  | 2,566,678 |
Less: Undistributed earnings allocated to non-vested shares |  |  | (55,958 | ) |  |  | (26,357 | ) |  |  | (13,457 | )
Net income attributable to common shareholders, basic |  |  | 21,161,235 |  |  |  | 12,659,469 |  |  |  | 2,553,221 |
Denominator |  |  |  |  |  |  |  |  |  |  |  |
Weighted average number of shares outstanding, basic and diluted |  |  | 28,271,746 |  |  |  | 39,305,644 |  |  |  | 41,315,127 |
Earnings per share, basic and diluted |  |  | 0.75 |  |  |  | 0.32 |  |  |  | 0.06 |

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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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