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Segment information (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Segment Reporting Information [Line Items]          
Revenues $ 18,824,188 $ 16,572,203 $ 50,032,798 $ 47,532,497  
Cost of revenues 11,297,515 10,264,397 29,305,494 27,934,550  
Gross profit 7,526,673 6,307,806 20,727,304 19,597,947  
General and administrative expenses 4,941,564 4,896,323 14,263,762 14,695,184  
Loss on asset dispositions and impairments, net 12,415 578,480 14,405 1,578,480  
Income (loss) from operations 2,572,694 833,003 6,449,137 3,324,283  
Other income, net 2,302,933 447,294 2,755,141 871,956  
Income before income taxes 4,875,627 1,280,297 9,204,278 4,196,239  
(Benefit from) income taxes 12,659 (136,447) (113,607) (412,592)  
Net income 4,862,968 1,416,744 9,317,885 4,608,831  
Income attributable to non-controlling interests 310,579 255,605 484,778 191,916  
Net income attributable to Consolidated Water Co. Ltd. stockholders 4,552,389 1,161,139 8,833,107 4,416,915  
Accounts receivable, net 22,996,276   22,996,276   $ 15,047,846
Property, plant and equipment, net 47,342,177   47,342,177   50,525,064
Construction in progress 16,742,806   16,742,806   1,823,284
Intangibles, net 2,710,790   2,710,790   3,765,434
Goodwill 8,384,248   8,384,248   8,384,248
Land and rights of way held for development 23,673,855   23,673,855   21,505,675
Total segment assets 172,502,559   172,502,559   165,480,895
Retail [Member]          
Segment Reporting Information [Line Items]          
Revenues 6,185,558 5,570,654 18,884,929 18,111,274  
Cost of revenues 2,750,599 2,488,441 8,234,803 7,895,617  
Gross profit 3,434,959 3,082,213 10,650,126 10,215,657  
General and administrative expenses 3,013,053 3,070,681 9,088,804 9,288,941  
Loss on asset dispositions and impairments, net 9,084 578,480 11,074 1,578,480  
Income (loss) from operations 412,822 (566,948) 1,550,248 (651,764)  
Accounts receivable, net 2,168,224   2,168,224   2,406,595
Property, plant and equipment, net 22,269,769   22,269,769   23,172,382
Construction in progress 6,175,313   6,175,313   321,368
Intangibles, net 0   0   0
Goodwill 1,170,511   1,170,511   1,170,511
Land and rights of way held for development 0   0   0
Total segment assets 59,900,046   59,900,046   52,095,524
Bulk [Member]          
Segment Reporting Information [Line Items]          
Revenues 8,577,456 7,881,464 25,294,821 23,615,787  
Cost of revenues 5,658,373 5,582,401 16,848,668 15,750,402  
Gross profit 2,919,083 2,299,063 8,446,153 7,865,385  
General and administrative expenses 455,151 315,374 1,147,015 940,105  
Loss on asset dispositions and impairments, net 0 0 0 0  
Income (loss) from operations 2,463,932 1,983,689 7,299,138 6,925,280  
Accounts receivable, net 17,967,332   17,967,332   10,177,620
Property, plant and equipment, net 23,338,279   23,338,279   25,420,819
Construction in progress 10,564,202   10,564,202   1,498,625
Intangibles, net 484,123   484,123   533,767
Goodwill 2,328,526   2,328,526   2,328,526
Land and rights of way held for development 0   0   0
Total segment assets 71,086,259   71,086,259   75,785,323
Services [Member]          
Segment Reporting Information [Line Items]          
Revenues 807,424 111,302 1,054,100 360,758  
Cost of revenues 682,713 114,667 921,653 320,586  
Gross profit 124,711 (3,365) 132,447 40,172  
General and administrative expenses 846,258 863,646 2,162,632 2,498,766  
Loss on asset dispositions and impairments, net 0 0 0 0  
Income (loss) from operations (721,547) (867,011) (2,030,185) (2,458,594)  
Accounts receivable, net 1,806,062   1,806,062   1,155,318
Property, plant and equipment, net 61,424   61,424   84,339
Construction in progress 3,291   3,291   3,291
Intangibles, net 0   0   0
Goodwill 0   0   0
Land and rights of way held for development 23,673,855   23,673,855   21,505,675
Total segment assets 27,352,165   27,352,165   24,488,173
Manufacturing [Member]          
Segment Reporting Information [Line Items]          
Revenues 3,253,750 3,008,783 4,798,948 5,444,678  
Cost of revenues 2,205,830 2,078,888 3,300,370 3,967,945  
Gross profit 1,047,920 929,895 1,498,578 1,476,733  
General and administrative expenses 627,102 646,622 1,865,311 1,967,372  
Loss on asset dispositions and impairments, net 3,331 0 3,331 0  
Income (loss) from operations 417,487 $ 283,273 (370,064) $ (490,639)  
Accounts receivable, net 1,054,658   1,054,658   1,308,313
Property, plant and equipment, net 1,672,705   1,672,705   1,847,524
Construction in progress 0   0   0
Intangibles, net 2,226,667   2,226,667   3,231,667
Goodwill 4,885,211   4,885,211   4,885,211
Land and rights of way held for development 0   0   0
Total segment assets $ 14,164,089   $ 14,164,089   $ 13,111,875