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Earnings per share (Tables)
3 Months Ended
Mar. 31, 2015
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 for the three months ended March 31, 2015 and 2014.
 
 
 
Three Months Ended March 31,
 
 
 
2015
 
2014
 
Net income attributable to Consolidated Water Co. Ltd. Common stockholders
 
$
1,921,261
 
$
654,909
 
Less: preferred stock dividends
 
 
(2,763)
 
 
(2,806)
 
Net income available to common shares in the determination of basic earnings per common share
 
$
1,918,498
 
$
652,103
 
 
 
 
 
 
 
 
 
Weighted average number of common shares in the determination of basic earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders
 
 
14,718,757
 
 
14,686,744
 
Plus:
 
 
 
 
 
 
 
Weighted average number of preferred shares outstanding during the period
 
 
36,840
 
 
37,408
 
Potential dilutive effect of unexercised options
 
 
8,572
 
 
42,833
 
Weighted average number of shares used for determining diluted earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders
 
 
14,764,169
 
 
14,766,985