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Earnings per share (Tables) | 3 Months Ended
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Mar. 31, 2019
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | The following summarizes information related to the computation of basic and diluted EPS:
|  | Three Months Ended March 31, |
|  | 2019 |  |  | 2018 |
Net income from continuing operations attributable to Consolidated Water Co. Ltd. stockholders |  | $ | 2,565,261 |  |  | $ | 1,765,468 |
Less: preferred stock dividends |  |  | (2,789 | ) |  |  | (2,478 | )
Net income from continuing operations available to common shares in the determination of basic earnings per common share |  |  | 2,562,472 |  |  |  | 1,762,990 |
Total income from discontinued operations |  |  | 3,621,170 |  |  |  | 327,057 |
Net income available to common shares in the determination of basic earnings per common share |  | $ | 6,183,642 |  |  | $ | 2,090,047 |
Weighted average number of common shares in the determination of basic earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders |  |  | 15,020,344 |  |  |  | 14,959,259 |
Plus: |  |  |  |  |  |  |  |
Weighted average number of preferred shares outstanding during the period |  |  | 33,480 |  |  |  | 33,084 |
Potential dilutive effect of unexercised options and unvested stock grants |  |  | 75,577 |  |  |  | 122,134 |
Weighted average number of shares used for determining diluted earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders |  |  | 15,129,401 |  |  |  | 15,114,477 |

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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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