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Segment information (Details) - USD ($)
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Segment Reporting Information [Line Items]      
Revenues $ 15,336,395 $ 15,677,106  
Cost of revenues 8,731,877 8,843,538  
Gross profit (loss) 6,604,518 6,833,568  
General and administrative expenses 4,767,444 4,797,192  
(Gain) Loss on asset dispositions and impairments, net 1,340 (9,627)  
Income (loss) from operations 1,835,734 2,046,003  
Other income, net 144,910 393,752  
Income before income taxes 1,980,644 2,439,755  
Provision for (benefit from) income taxes (77,388) (139,697)  
Net income 2,058,032 2,579,452  
Loss attributable to non-controlling interests (34,493) (51,776)  
Net income attributable to Consolidated Water Co. Ltd. stockholders 2,092,525 2,631,228  
Total segment assets 165,913,895   $ 165,480,895
Accounts receivable, net 17,840,028   15,047,846
Property plant and equipment, net 49,519,137   50,525,064
Construction in progress 5,230,707   1,823,284
Intangibles, net 3,413,886   3,765,434
Goodwill 8,384,248   8,384,248
Land held for development 20,558,424   20,558,424
Retail [Member]      
Segment Reporting Information [Line Items]      
Revenues 6,431,348 6,476,604  
Cost of revenues 2,761,554 2,684,286  
Gross profit (loss) 3,669,794 3,792,318  
General and administrative expenses 3,145,483 3,012,860  
(Gain) Loss on asset dispositions and impairments, net 1,340 (9,600)  
Income (loss) from operations 522,971 789,058  
Total segment assets 51,709,730   52,095,524
Accounts receivable, net 2,784,040   2,406,595
Property plant and equipment, net 22,982,719   23,172,382
Construction in progress 1,679,113   321,368
Intangibles, net 0   0
Goodwill 1,170,511   1,170,511
Land held for development 0   0
Bulk [Member]      
Segment Reporting Information [Line Items]      
Revenues 8,228,515 7,690,402  
Cost of revenues 5,396,591 5,015,789  
Gross profit (loss) 2,831,924 2,674,613  
General and administrative expenses 341,967 301,076  
(Gain) Loss on asset dispositions and impairments, net 0 0  
Income (loss) from operations 2,489,957 2,373,537  
Total segment assets 77,994,082   75,785,323
Accounts receivable, net 13,656,231   10,177,620
Property plant and equipment, net 24,675,709   25,420,819
Construction in progress 3,548,303   1,498,625
Intangibles, net 517,219   533,767
Goodwill 2,328,526   2,328,526
Land held for development 0   0
Services [Member]      
Segment Reporting Information [Line Items]      
Revenues 123,764 130,252  
Cost of revenues 134,871 102,166  
Gross profit (loss) (11,107) 28,086  
General and administrative expenses 650,636 743,406  
(Gain) Loss on asset dispositions and impairments, net 0 0  
Income (loss) from operations (661,743) (715,320)  
Total segment assets 24,945,642   24,488,173
Accounts receivable, net 1,362,482   1,155,318
Property plant and equipment, net 76,701   84,339
Construction in progress 3,291   3,291
Intangibles, net 0   0
Goodwill 0   0
Land held for development 20,558,424   20,558,424
Manufacturing [Member]      
Segment Reporting Information [Line Items]      
Revenues 552,768 1,379,848  
Cost of revenues 438,861 1,041,297  
Gross profit (loss) 113,907 338,551  
General and administrative expenses 629,358 739,850  
(Gain) Loss on asset dispositions and impairments, net 0 (27)  
Income (loss) from operations (515,451) $ (401,272)  
Total segment assets 11,264,441   13,111,875
Accounts receivable, net 37,275   1,308,313
Property plant and equipment, net 1,784,008   1,847,524
Construction in progress 0   0
Intangibles, net 2,896,667   3,231,667
Goodwill 4,885,211   4,885,211
Land held for development $ 0   $ 0