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Earnings per share (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Earnings Per Share [Line Items]
Net income from continuing operations attributable to Consolidated Water Co. Ltd. stockholders	$ 10,177,662	$ 5,102,828
Less: preferred stock dividends	(12,356)	(11,418)
Net income from continuing operations available to common shares in the determination of basic earnings per common share	10,165,306	5,091,410
Net income from discontinued operations	1,115,825	1,041,234
Net income available to common shares in the determination of basic earnings per common share	$ 11,281,131	$ 6,132,644
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)	14,962,760	14,896,944
Weighted average number of preferred shares outstanding during the period (in shares)	35,125	35,765
Potential dilutive effect of unexercised options and unvested stock grants	76,262	73,972
Weighted average number of shares used for determining diluted earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders (in shares)	15,074,147	15,006,681

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