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Segment information (Tables) | 12 Months Ended
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Dec. 31, 2012
Segment Reporting [Abstract] |
Schedule of Segment Reporting Information, by Segment [Table Text Block] | The Company’s segments are strategic business units that are managed separately because, while all segments derive their revenues from desalination-related activities, each segment sells different products and/or services, serves customers with distinctly different needs and generates different gross profit margins.
|  | As of and for the year ended December 31, 2012 |
|  | Retail |  |  | Bulk |  |  | Services |  |  | Total |
Revenues |  | $ | 24,222,895 |  |  | $ | 40,758,182 |  |  | $ | 469,625 |  |  | $ | 65,450,702 |
Cost of revenues |  |  | 11,548,255 |  |  |  | 31,679,887 |  |  |  | 230,118 |  |  |  | 43,458,260 |
Gross profit |  |  | 12,674,640 |  |  |  | 9,078,295 |  |  |  | 239,507 |  |  |  | 21,992,442 |
General and administrative expenses |  |  | 11,304,528 |  |  |  | 1,384,527 |  |  |  | 1,853,762 |  |  |  | 14,542,817 |
Impairment losses |  |  | - |  |  |  | 432,727 |  |  |  | 88,717 |  |  |  | 521,444 |
Income (loss) from operations |  |  | 1,370,112 |  |  |  | 7,261,041 |  |  |  | (1,702,972 | ) |  |  | 6,928,181 |
Other income (expense), net |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,695,828 |
Consolidated net income |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9,624,009 |
Income attributable to non-controlling interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 308,495 |
Net income attributable to Consolidated Water Co. Ltd. stockholders |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | 9,315,514 |
As of December 31, 2012: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property plant and equipment, net |  | $ | 24,021,301 |  |  | $ | 34,308,805 |  |  | $ | 663,300 |  |  | $ | 58,993,406 |
Construction in progress |  |  | 2,342,248 |  |  |  | 270,552 |  |  |  | - |  |  |  | 2,612,800 |
Goodwill |  |  | 1,170,511 |  |  |  | 2,328,526 |  |  |  | - |  |  |  | 3,499,037 |
Total assets |  |  | 63,649,696 |  |  |  | 83,177,550 |  |  |  | 3,621,840 |  |  |  | 150,449,086 |
|  | As of and for the year ended December 31, 2011 |
|  | Retail |  |  | Bulk |  |  | Services |  |  | Total |
Revenues |  | $ | 23,356,338 |  |  | $ | 30,757,874 |  |  | $ | 1,040,280 |  |  | $ | 55,154,492 |
Cost of revenues |  |  | 11,496,598 |  |  |  | 24,127,488 |  |  |  | 508,339 |  |  |  | 36,132,425 |
Gross profit |  |  | 11,859,740 |  |  |  | 6,630,386 |  |  |  | 531,941 |  |  |  | 19,022,067 |
General and administrative expenses |  |  | 9,102,291 |  |  |  | 1,285,121 |  |  |  | 3,264,238 |  |  |  | 13,651,650 |
Income (loss) from operations |  |  | 2,757,449 |  |  |  | 5,345,265 |  |  |  | (2,732,297 | ) |  |  | 5,370,417 |
Other income (expense), net |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,181,563 |
Consolidated net income |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,551,980 |
Income attributable to non-controlling interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 438,762 |
Net income attributable to Consolidated Water Co. Ltd. stockholders |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | 6,113,218 |
As of December 31, 2011: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property plant and equipment, net |  | $ | 25,456,103 |  |  | $ | 37,824,507 |  |  | $ | 904,500 |  |  | $ | 64,185,110 |
Construction in progress |  |  | 141,204 |  |  |  | - |  |  |  | - |  |  |  | 141,204 |
Goodwill |  |  | 1,170,511 |  |  |  | 2,328,526 |  |  |  | 88,717 |  |  |  | 3,587,754 |
Total assets |  |  | 73,557,410 |  |  |  | 83,457,607 |  |  |  | 3,844,414 |  |  |  | 160,859,431 |
|  | As of and for the year ended December 31, 2010 |
|  | Retail |  |  | Bulk |  |  | Services |  |  | Total |
Revenues |  | $ | 21,864,252 |  |  | $ | 25,302,093 |  |  | $ | 3,542,209 |  |  | $ | 50,708,554 |
Cost of revenues |  |  | 10,361,302 |  |  |  | 20,907,981 |  |  |  | 2,828,776 |  |  |  | 34,098,059 |
Gross profit |  |  | 11,502,950 |  |  |  | 4,394,112 |  |  |  | 713,433 |  |  |  | 16,610,495 |
General and administrative expenses |  |  | 8,105,740 |  |  |  | 1,247,076 |  |  |  | 1,976,832 |  |  |  | 11,329,648 |
Income (loss) from operations |  |  | 3,397,210 |  |  |  | 3,147,036 |  |  |  | (1,263,399 | ) |  |  | 5,280,847 |
Other income (expense), net |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,162,315 |
Consolidated net income |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,443,162 |
Income attributable to non-controlling interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 151,137 |
Net income attributable to Consolidated Water Co. Ltd. stockholders |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | 6,292,025 |
As of December 31, 2010: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, net |  | $ | 26,426,273 |  |  | $ | 28,350,519 |  |  | $ | 1,146,939 |  |  | $ | 55,923,731 |
Construction in progress |  |  | 249,300 |  |  |  | - |  |  |  | - |  |  |  | 249,300 |
Goodwill |  |  | 1,170,511 |  |  |  | 2,328,526 |  |  |  | 88,717 |  |  |  | 3,587,754 |
Total assets |  |  | 77,481,333 |  |  |  | 69,343,561 |  |  |  | 5,376,672 |  |  |  | 152,201,566 |
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block] | The following table presents revenues earned by major geographic region:
|  | Year Ended December 31, |
|  | 2012 |  |  | 2011 |  |  | 2010 |
Cayman Island operations |  | $ | 33,661,440 |  |  | $ | 32,223,536 |  |  | $ | 30,966,110 |
Bahamas operations |  |  | 28,996,724 |  |  |  | 19,825,070 |  |  |  | 16,188,416 |
Belize operations |  |  | 2,322,913 |  |  |  | 2,065,606 |  |  |  | 1,809,504 |
Bermuda operations |  |  | - |  |  |  | 722,774 |  |  |  | 1,087,786 |
Revenues earned from management services agreement with OC-BVI |  |  | 469,625 |  |  |  | 317,506 |  |  |  | 656,738 |
|  | $ | 65,450,702 |  |  | $ | 55,154,492 |  |  | $ | 50,708,554 |
Revenues earned from the Water and Sewerage Corporation ("WSC") |  | $ | 28,765,529 |  |  | $ | 19,610,650 |  |  | $ | 15,941,021 |
Percentage of total revenues from the WSC |  |  | 44 | % |  |  | 36 | % |  |  | 31 | %
Revenues earned from the Water Authority - Cayman ("WAC") |  | $ | 9,438,545 |  |  | $ | 8,867,198 |  |  | $ | 7,304,173 |
Percentage of total revenues from the WAC |  |  | 14 | % |  |  | 16 | % |  |  | 14 | %
Schedule Of Property Plant and Equipment By Major Geographic Region [Table Text Block] | The following table presents property, plant and equipment, net by major geographic region:
|  | December 31, |
|  | 2012 |  |  | 2011 |
Cayman Island operations |  | $ | 24,004,499 |  |  | $ | 26,189,796 |
Bahamas operations |  |  | 33,710,233 |  |  |  | 36,437,351 |
Belize operations |  |  | 1,134,721 |  |  |  | 1,202,017 |
All other country operations |  |  | 143,953 |  |  |  | 355,946 |
|  | $ | 58,993,406 |  |  | $ | 64,185,110 |

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8736-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8813-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27, 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8906-108599 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8721-108599 + Details
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