Earnings per share (Tables)

12 Months Ended

Dec. 31, 2018

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

The following summarizes information related to the computation of basic and diluted EPS:

	Year Ended December 31,
	2018			2017
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 operation		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		14,962,760			14,896,944
Plus:
Weighted average number of preferred shares outstanding during the period		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		15,074,147			15,006,681