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Earnings per share (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Net income from continuing operations attributable to Consolidated Water Co. Ltd. stockholders	$ 2,476,262	$ 1,888,818	$ 5,041,523	$ 3,654,286
Less: preferred stock dividends	(3,410)	(3,488)	(6,199)	(6,296)
Net income from continuing operations available to common shares in the determination of basic earnings per common share	2,472,852	1,885,330	5,035,324	3,647,990
Total income from discontinued operations	0	299,375	3,621,170	626,432
Net income available to common shares in the determination of basic earnings per common share	$ 2,472,852	$ 2,184,705	$ 8,656,494	$ 4,274,422
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	14,959,309	15,020,344	14,959,284
Weighted average number of preferred shares outstanding during the period (in shares)	34,183	34,442	33,834	33,767
Potential dilutive effect of unexercised options and unvested stock grants	76,251	123,975	75,893	123,661
Weighted average number of shares used for determining diluted earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders (in shares)	15,130,778	15,117,726	15,130,071	15,116,712

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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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