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Earnings per share (Tables) | 6 Months Ended
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Jun. 30, 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 June 30, |  |  | Six Months Ended June 30, |
|  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
Net income from continuing operations attributable to Consolidated Water Co. Ltd. stockholders |  | $ | 2,476,262 |  |  | $ | 1,888,818 |  |  | $ | 5,041,523 |  |  | $ | 3,654,286 |
Less: preferred stock dividends |  |  | (3,410 | ) |  |  | (3,488 | ) |  |  | (6,199 | ) |  |  | (6,296 | )
Net income from continuing operations available to common shares in the determination of basic earnings per common share |  |  | 2,472,852 |  |  |  | 1,885,330 |  |  |  | 5,035,324 |  |  |  | 3,647,990 |
Total income from discontinued operations |  |  | - |  |  |  | 299,375 |  |  |  | 3,621,170 |  |  |  | 626,432 |
Net income available to common shares in the determination of basic earnings per common share |  | $ | 2,472,852 |  |  | $ | 2,184,705 |  |  | $ | 8,656,494 |  |  | $ | 4,274,422 |
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 |  |  |  | 14,959,309 |  |  |  | 15,020,344 |  |  |  | 14,959,284 |
Plus: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average number of preferred shares outstanding during the period |  |  | 34,183 |  |  |  | 34,442 |  |  |  | 33,834 |  |  |  | 33,767 |
Potential dilutive effect of unexercised options and unvested stock grants |  |  | 76,251 |  |  |  | 123,975 |  |  |  | 75,893 |  |  |  | 123,661 |
Weighted average number of shares used for determining diluted earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders |  |  | 15,130,778 |  |  |  | 15,117,726 |  |  |  | 15,130,071 |  |  |  | 15,116,712 |

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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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