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Earnings per share (Details) - USD ($) | 3 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022
Earnings per share |  |
Net income from continuing operations attributable to Consolidated Water Co. Ltd. stockholders | $ 4,072,789 | $ 2,324,129
Less: preferred stock dividends | (2,923) | (2,434)
Net income from continuing operations available to common shares in the determination of basic earnings per common share | 4,069,866 | 2,321,695
Total loss from discontinued operations | (259,163) | (607,314)
Net income available to common shares in the determination of basic earnings per common share | $ 3,810,703 | $ 1,714,381
Weighted average number of common shares in the determination of basic earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders (in shares) | 15,723,595 | 15,285,523
Weighted average number of preferred shares outstanding during the period (in shares) | 34,383 | 28,635
Potential dilutive effect of unexercised options and unvested stock grants | 130,050 | 121,533
Weighted average number of shares used for determining diluted earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders | 15,888,028 | 15,435,691

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