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