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