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Note 15 - Earnings (Loss) Per 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, |
|  | 2015 |  |  | 2016 |  |  | 2017 |
Numerator |  |  |  |  |  |  |  |  |
Net income/(loss) |  |  | 2,566,678 |  |  |  | (7,798,300 | ) |  |  | (1,218,237 | )
Less: Undistributed earnings allocated to non-vested shares |  |  | (13,457 | ) |  |  | — |  |  |  | — |
Net income/(loss) attributable to common shareholders, basic |  |  | 2,553,221 |  |  |  | (7,798,300 | ) |  |  | (1,218,237 | )
Denominator |  |  |  |  |  |  |  |  |  |  |  |
Weighted average number of shares outstanding, basic and diluted |  |  | 41,315,127 |  |  |  | 39,824,038 |  |  |  | 39,809,364 |
Earnings/(loss) per share, basic and diluted |  |  | 0.06 |  |  |  | (0.20 | ) |  |  | (0.03 | )

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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://fasb.org/us-gaap/role/ref/legacyRef -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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