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Investment in OC-BVI (Details 1) (Ocean Conversion (Bvi) Ltd [Member], USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Ocean Conversion (Bvi) Ltd [Member] |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Revenues | $ 4,679,829 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember | $ 4,711,091 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember |  | $ 4,371,520 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember |
Gross profit | 1,846,822 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationGrossProfitLoss / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember | 1,824,271 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationGrossProfitLoss / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember |  | 1,545,568 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationGrossProfitLoss / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember |
Income from operations | 906,750 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationIncomeLossFromContinuingOperationsBeforeExtraordinaryItems / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember | 866,528 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationIncomeLossFromContinuingOperationsBeforeExtraordinaryItems / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember |  | 496,755 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationIncomeLossFromContinuingOperationsBeforeExtraordinaryItems / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember |
Other income (expense), net | (188,751)cwco_EquityMethodInvestmentSummarizedFinancialInformationOtherIncomeExpense / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember | 1,411,932 cwco_EquityMethodInvestmentSummarizedFinancialInformationOtherIncomeExpense / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember | [1] | 4,410,425 cwco_EquityMethodInvestmentSummarizedFinancialInformationOtherIncomeExpense / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember | [1]
Net income attributable to controlling interests | $ 696,954 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember | $ 2,250,667 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember |  | $ 4,873,236 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember |
[1] | Other income (expense), net, includes $0, $2.0 million and $4.7 million for the years ended December 31, 2014, 2013 and 2012, respectively, in award amounts received under the Court ruling for the Baughers Bay litigation.

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