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Segment information (Details) - USD ($)
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Segment Reporting Information [Line Items]      
Revenues $ 16,988,524 $ 14,554,663  
Cost of revenues 10,026,221 8,385,622  
Gross profit (loss) 6,962,303 6,169,041  
General and administrative expenses 4,378,034 4,661,711  
Gain (loss) on asset dispositions and impairments, net 43,769 (1,340)  
Income (loss) from operations 2,628,038 1,505,990  
Other income, net 260,090 147,597  
Income before income taxes 2,888,128 1,653,587  
Provision for (Benefit from) income taxes 48,959 (77,388)  
Net income from continuing operations 2,839,169 1,730,975  
Income from continuing operations attributable to non-controlling interests 273,908 (34,493)  
Net income from continuing operations attributable to Consolidated Water Co. Ltd. stockholders 2,565,261 1,765,468  
Total income from discontinued operations 3,621,170 327,057  
Net income attributable to Consolidated Water Co. Ltd. stockholders 6,186,431 2,092,525  
Accounts receivable, net 22,452,168   $ 24,228,095
Property plant and equipment, net 64,294,070   58,880,818
Construction in progress 406,280   6,015,043
Intangibles, net 1,667,778   1,891,667
Goodwill 8,004,597   8,004,597
Land and rights of way held for development 24,161,024   24,161,024
Assets of discontinued operations 0   3,903,527
Assets, Total 181,230,726   172,515,598
Retail [Member]      
Segment Reporting Information [Line Items]      
Revenues 6,686,660 6,431,348  
Cost of revenues 2,825,604 2,761,554  
Gross profit (loss) 3,861,056 3,669,794  
General and administrative expenses 3,117,278 3,145,483  
Gain (loss) on asset dispositions and impairments, net (2,731) (1,340)  
Income (loss) from operations 741,047 522,971  
Accounts receivable, net 3,005,535   2,947,193
Property plant and equipment, net 30,193,276   24,435,501
Construction in progress 37,611   5,437,093
Intangibles, net 0   0
Goodwill 1,170,511   1,170,511
Land and rights of way held for development 0   0
Assets, Total 64,288,344   61,210,879
Bulk [Member]      
Segment Reporting Information [Line Items]      
Revenues 7,111,313 7,446,783  
Cost of revenues 4,954,591 5,050,336  
Gross profit (loss) 2,156,722 2,396,447  
General and administrative expenses 261,412 236,234  
Gain (loss) on asset dispositions and impairments, net 46,500 0  
Income (loss) from operations 1,941,810 2,160,213  
Accounts receivable, net 17,589,889   18,480,589
Property plant and equipment, net 32,488,494   32,820,908
Construction in progress 368,669   574,659
Intangibles, net 0   0
Goodwill 1,948,875   1,948,875
Land and rights of way held for development 0   0
Assets, Total 69,561,766   67,740,088
Services [Member]      
Segment Reporting Information [Line Items]      
Revenues 100,577 123,764  
Cost of revenues 121,919 134,871  
Gross profit (loss) (21,342) (11,107)  
General and administrative expenses 485,885 650,636  
Gain (loss) on asset dispositions and impairments, net 0 0  
Income (loss) from operations (507,227) (661,743)  
Accounts receivable, net 1,442,301   1,812,838
Property plant and equipment, net 13,636   14,772
Construction in progress 0   3,291
Intangibles, net 0   0
Goodwill 0   0
Land and rights of way held for development 24,161,024   24,161,024
Assets, Total 31,942,450   27,406,983
Manufacturing Units [Member]      
Segment Reporting Information [Line Items]      
Revenues 3,089,974 552,768  
Cost of revenues 2,124,107 438,861  
Gross profit (loss) 965,867 113,907  
General and administrative expenses 513,459 629,358  
Gain (loss) on asset dispositions and impairments, net 0 0  
Income (loss) from operations 452,408 $ (515,451)  
Accounts receivable, net 414,443   987,475
Property plant and equipment, net 1,598,664   1,609,637
Construction in progress 0   0
Intangibles, net 1,667,778   1,891,667
Goodwill 4,885,211   4,885,211
Land and rights of way held for development 0   0
Assets, Total 15,438,166   12,254,121
Continuing Operations [Member]      
Segment Reporting Information [Line Items]      
Assets, Total $ 181,230,726   $ 168,612,071