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Earnings per share (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Earnings per share
Net income from continuing operations attributable to Consolidated Water Co. Ltd. stockholders	$ 2,888,607	$ 2,565,261
Less: preferred stock dividends	(2,869)	(2,789)
Net income from continuing operations available to common shares in the determination of basic earnings per common share	2,885,738	2,562,472
Total income from discontinued operations		3,621,170
Net income available to common shares in the determination of basic earnings per common share	$ 2,885,738	$ 6,183,642
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)	15,114,506	15,020,344
Weighted average number of preferred shares outstanding during the period (in shares)	33,751	33,480
Potential dilutive effect of unexercised options and unvested stock grants	120,627	130,611
Weighted average number of shares used for determining diluted earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders	15,268,884	15,184,435

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Amount of paid and unpaid preferred stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK).

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