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Investment in OC-BVI (Details 1) (Ocean Conversion (Bvi) Ltd [Member], USD $) | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Ocean Conversion (Bvi) Ltd [Member] |  |
Condensed Income Statements, Captions [Line Items] |  |
Revenues | $ 1,068,901 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember | $ 1,175,129 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember
Cost of revenues | 581,644 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCostOfSales / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember | 721,149 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCostOfSales / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember
Gross profit | 487,257 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationGrossProfitLoss / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember | 453,980 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationGrossProfitLoss / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember
General and administrative expenses | 244,342 cwco_EquityMethodInvestmentSummarizedFinancialInformationOnGeneralAndAdminisrativeExpenses / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember | 266,677 cwco_EquityMethodInvestmentSummarizedFinancialInformationOnGeneralAndAdminisrativeExpenses / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember
Income (loss) from operations | 242,915 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationIncomeLossFromContinuingOperationsBeforeExtraordinaryItems / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember | 187,303 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationIncomeLossFromContinuingOperationsBeforeExtraordinaryItems / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember
Other income (expense), net | (52,649)cwco_EquityMethodInvestmentSummarizedFinancialInformationOtherIncomeExpense / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember | (54,954)cwco_EquityMethodInvestmentSummarizedFinancialInformationOtherIncomeExpense / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember
Net income | 190,266 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember | 132,349 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember
Income attributable to non-controlling interests | 17,614 cwco_EquityMethodInvestmentSummarizedFinancialInformationOnNetIncomeLossAttributableToNonControllingInterests / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember | 7,173 cwco_EquityMethodInvestmentSummarizedFinancialInformationOnNetIncomeLossAttributableToNonControllingInterests / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember
Net income attributable to controlling interests | $ 172,652 cwco_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLossAttributableToParent / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember | $ 125,176 cwco_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLossAttributableToParent / dei_LegalEntityAxis = cwco_OceanConversionBviLtdMember

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