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Earnings per share (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Net income from continuing operations attributable to Consolidated Water Co. Ltd. stockholders $ 1,691,990 $ 2,339,950 $ 4,399,083 $ 4,380,640
Less: preferred stock dividends (3,382) (3,390) (6,023) (6,241)
Net income from continuing operations available to common shares in the determination of basic earnings per common share 1,688,608 2,336,560 4,393,060 4,374,399
Net loss from discontinued operations (1,067,442) (135,617) (1,143,307) (121,666)
Net income available to common shares in the determination of basic earnings per common share $ 621,166 $ 2,200,943 $ 3,249,753 $ 4,252,733
Weighted average number of common shares in the determination of basic earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders 14,889,816 14,792,053 14,880,889 14,787,716
Plus:        
Weighted average number of preferred shares outstanding during the period 36,684 39,255 35,958 38,919
Potential dilutive effect of unexercised options 129,054 39,811 128,357 37,156
Weighted average number of shares used for determining diluted earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders 15,055,554 14,871,119 15,045,204 14,863,791