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Earnings per share (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Earnings per share
Net income from continuing operations attributable to Consolidated Water Co. Ltd. stockholders	$ (1,513,270)	$ 2,627,270	$ (211,704)	$ 5,832,242
Less: preferred stock dividends	(3,175)	(3,420)	(5,734)	(6,289)
Net income from continuing operations available to common shares in the determination of basic earnings per common share	(1,516,445)	2,623,850	(217,438)	5,825,953
Total income (loss) from discontinued operations	(151,379)	(3,755,112)	(464,173)	(4,071,477)
Net income available to common shares in the determination of basic earnings per common share	$ (1,667,824)	$ (1,131,262)	$ (681,611)	$ 1,754,476
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)	15,201,682	15,114,506	15,201,571	15,114,506
Weighted average number of preferred shares outstanding during the period (in shares)		35,126		34,438
Potential dilutive effect of unexercised options and unvested stock grants		119,702		120,231
Weighted average number of shares used for determining diluted earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders	15,201,682	15,269,334	15,201,571	15,269,175

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