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Earnings per share (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Earnings Per Share [Line Items]
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 (in shares)	15,020,344	14,959,259
Weighted average number of preferred shares outstanding during the period (in shares)	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 (in shares)	15,129,401	15,114,477

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