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v2.4.0.8

Segment information (Details 1) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Segment Reporting Information [Line Items] |  |  |
Entity Wide Revenues Major Customer Amount | $ 63,822,131 | $ 65,450,702 | $ 55,154,492
Cayman Islands [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Entity Wide Revenues Major Customer Amount | 31,164,165 | 33,661,440 | 32,223,536
Bahamas [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Entity Wide Revenues Major Customer Amount | 29,192,529 | 28,996,724 | 19,825,070
Indonesia [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Entity Wide Revenues Major Customer Amount | 144,030 | 0 | 0
Belize [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Entity Wide Revenues Major Customer Amount | 2,536,780 | 2,322,913 | 2,065,606
Bermuda [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Entity Wide Revenues Major Customer Amount | 0 | 0 | 722,774
Oc Bvi [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Entity Wide Revenues Major Customer Amount | 784,627 | 469,625 | 317,506
Water And Sewerage Corporation [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Entity Wide Revenues Major Customer Amount | 28,861,195 | 28,765,529 | 19,610,650
Entity Wide Revenues Major Customer Percentage | 45.00% | 44.00% | 36.00%
Water Authority Cayman [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Entity Wide Revenues Major Customer Amount | $ 8,230,912 | $ 9,438,545 | $ 8,867,198
Entity Wide Revenues Major Customer Percentage | 13.00% | 14.00% | 16.00%

X
- Definition Amount of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues. + References No definition available. + Details
Name: | cwco_EntityWideRevenuesMajorCustomerAmount
Namespace Prefix: | cwco_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues. + References No definition available. + Details
Name: | cwco_EntityWideRevenuesMajorCustomerPercentage
Namespace Prefix: | cwco_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration