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Investment in OC-BVI (Details Textual) (USD $) | 3 Months Ended | 12 Months Ended | 108 Months Ended | 3 Months Ended | 12 Months Ended | 42 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2014 gal | Dec. 31, 2014 gal | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2003 | Dec. 31, 2009 | Dec. 31, 2011 | Dec. 31, 2010 | Jun. 30, 2012 | Dec. 31, 2007 gal | Mar. 04, 2010 gal
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage | 43.50%us-gaap_EquityMethodInvestmentOwnershipPercentage | 43.50%us-gaap_EquityMethodInvestmentOwnershipPercentage |  |  |  |  |  |  |  |  |
Equity Method Investments Voting Shares Percentage | 50.00%cwco_EquityMethodInvestmentsVotingSharesPercentage | 50.00%cwco_EquityMethodInvestmentsVotingSharesPercentage |  |  |  |  |  |  |  |  |
Equity Method Investment, Interest In Profit Percentage | 45.00%cwco_EquityMethodInvestmentInterestInProfitPercentage | 45.00%cwco_EquityMethodInvestmentInterestInProfitPercentage |  |  |  |  |  |  |  |  |
Delivery Terms, Volume of water per day | 63,000,000 cwco_DeliveryTermsVolumeOfWaterPerDay | 63,000,000 cwco_DeliveryTermsVolumeOfWaterPerDay |  |  |  |  |  |  |  |  |
Other than Temporary Impairment Losses, Investments | $ 860,000 us-gaap_ImpairmentOfInvestments |  |  |  |  |  |  |  |  |  |
Equity Method Investments | 5,208,603 us-gaap_EquityMethodInvestments | 5,208,603 us-gaap_EquityMethodInvestments | 6,623,448 us-gaap_EquityMethodInvestments |  |  |  |  |  |  |  |
Intangible assets, net | 927,900 us-gaap_IntangibleAssetsNetExcludingGoodwill | 927,900 us-gaap_IntangibleAssetsNetExcludingGoodwill | 1,096,488 us-gaap_IntangibleAssetsNetExcludingGoodwill |  |  |  |  |  |  |  |
Income (Loss) from Equity Method Investments |  | 303,380 us-gaap_IncomeLossFromEquityMethodInvestments | 979,716 us-gaap_IncomeLossFromEquityMethodInvestments | 2,121,319 us-gaap_IncomeLossFromEquityMethodInvestments |  |  |  |  |  |  |
Profit Loss From Subsidiaries |  | 111,375 cwco_ProfitLossFromSubsidiaries | 357,636 cwco_ProfitLossFromSubsidiaries | 343,454 cwco_ProfitLossFromSubsidiaries |  |  |  |  |  |  |
Sales Revenue, Services, Net |  | 2,253,135 us-gaap_SalesRevenueServicesNet | 843,413 us-gaap_SalesRevenueServicesNet | 469,625 us-gaap_SalesRevenueServicesNet |  |  |  |  |  |  |
Property, Plant and Equipment, Net | 56,396,988 us-gaap_PropertyPlantAndEquipmentNet | 56,396,988 us-gaap_PropertyPlantAndEquipmentNet | 58,602,886 us-gaap_PropertyPlantAndEquipmentNet |  |  |  |  |  |  |  |
Bar Bay plant [Member] |  |  |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment, Net | 5,100,000 us-gaap_PropertyPlantAndEquipmentNet / cwco_PlantAxis = cwco_BarBayPlantMember | 5,100,000 us-gaap_PropertyPlantAndEquipmentNet / cwco_PlantAxis = cwco_BarBayPlantMember |  |  |  |  |  |  |  |  |
1990 Agreement [Member] |  |  |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Cost to Expand Production Capacity of Plant |  |  |  |  | 4,700,000 cwco_CostIncurredToExpandPlantCapacity / cwco_AgreementAxis = cwco_ThousandNineHundredAndNinetyAgreementMember |  |  |  |  |  |
Proceeds from Legal Settlements |  |  |  | 4,700,000 us-gaap_ProceedsFromLegalSettlements / cwco_AgreementAxis = cwco_ThousandNineHundredAndNinetyAgreementMember |  |  |  |  |  |  |
Plant Capacity |  |  |  |  |  | 1,700,000 cwco_PlantCapacity / cwco_AgreementAxis = cwco_ThousandNineHundredAndNinetyAgreementMember |  |  |  | 720,000 cwco_PlantCapacity / cwco_AgreementAxis = cwco_ThousandNineHundredAndNinetyAgreementMember |
Bar Bay Agreement [Member] |  |  |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Delivery Terms, Volume of water per day |  |  |  |  |  |  |  |  |  |  | 600,000 cwco_DeliveryTermsVolumeOfWaterPerDay / cwco_AgreementAxis = cwco_BarBayAgreementMember
Management Service [Member] |  |  |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Intangible assets, net | 196,000 us-gaap_IntangibleAssetsNetExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = cwco_ManagementServiceMember | 196,000 us-gaap_IntangibleAssetsNetExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = cwco_ManagementServiceMember | 285,000 us-gaap_IntangibleAssetsNetExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = cwco_ManagementServiceMember |  |  |  |  |  |  |  |
Ocean Conversion (BVI) Ltd [Member] |  |  |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Equity Method Investments | 5,200,000 us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cwco_OceanConversionBviLtdMember | 5,200,000 us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cwco_OceanConversionBviLtdMember |  |  |  |  |  |  |  |  |
Loss Contingency, Damages Awarded, Value |  |  |  | 10,400,000 us-gaap_LossContingencyDamagesAwardedValue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cwco_OceanConversionBviLtdMember |  |  |  |  |  |  |
Proceeds from Legal Settlements |  |  | 2,000,000 us-gaap_ProceedsFromLegalSettlements / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cwco_OceanConversionBviLtdMember |  |  | 2,000,000 us-gaap_ProceedsFromLegalSettlements / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cwco_OceanConversionBviLtdMember | 1,000,000 us-gaap_ProceedsFromLegalSettlements / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cwco_OceanConversionBviLtdMember | 2,000,000 us-gaap_ProceedsFromLegalSettlements / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cwco_OceanConversionBviLtdMember |  |  |
Loss Contingency, Damages Paid, Value |  |  |  |  |  |  |  |  | 5,000,000 us-gaap_LossContingencyDamagesPaidValue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cwco_OceanConversionBviLtdMember |  |
Legal Settlement Recovery Principle Amount Due |  |  |  | 5,400,000 cwco_LegalSettlementRecoveryPrincipleAmountDue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cwco_OceanConversionBviLtdMember |  |  |  |  |  |  |
Legal Settlement Recovery Due |  |  |  | 6,700,000 cwco_LegalSettlementRecoveryDue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cwco_OceanConversionBviLtdMember |  |  |  |  |  |  |
Income (Loss) from Equity Method Investments |  | 303,380 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cwco_OceanConversionBviLtdMember | 979,716 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cwco_OceanConversionBviLtdMember | 2,121,319 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cwco_OceanConversionBviLtdMember |  |  |  |  |  |  |
Profit Loss From Subsidiaries |  | 111,375 cwco_ProfitLossFromSubsidiaries / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cwco_OceanConversionBviLtdMember | 357,636 cwco_ProfitLossFromSubsidiaries / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cwco_OceanConversionBviLtdMember | 343,454 cwco_ProfitLossFromSubsidiaries / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cwco_OceanConversionBviLtdMember |  |  |  |  |  |  |
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity | 2,000,000 us-gaap_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cwco_OceanConversionBviLtdMember | 2,000,000 us-gaap_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cwco_OceanConversionBviLtdMember |  |  |  |  |  |  |  |  |
Ocean Conversion (BVI) Ltd [Member] | Management Service [Member] |  |  |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Sales Revenue, Services, Net |  | 747,340 us-gaap_SalesRevenueServicesNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = cwco_ManagementServiceMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cwco_OceanConversionBviLtdMember | 784,626 us-gaap_SalesRevenueServicesNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = cwco_ManagementServiceMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cwco_OceanConversionBviLtdMember | 469,625 us-gaap_SalesRevenueServicesNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = cwco_ManagementServiceMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cwco_OceanConversionBviLtdMember |  |  |  |  |  |  |
Baughers Bay [Member] |  |  |  |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Purchase Price Agreed for Plant Under Agreement | $ 1,420,000 cwco_PurchasePriceAgreedForPlantUnderAgreement / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cwco_BaughersBayMember | $ 1,420,000 cwco_PurchasePriceAgreedForPlantUnderAgreement / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cwco_BaughersBayMember |  |  |  |  |  |  | $ 1,420,000 cwco_PurchasePriceAgreedForPlantUnderAgreement / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cwco_BaughersBayMember |  |

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