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N.S.C. Agua, S.A. de C.V. (Details Textual) | 12 Months Ended |  | 0 Months Ended | 1 Months Ended | 3 Months Ended | 12 Months Ended |  | 12 Months Ended
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Dec. 31, 2014 USD ($) gal | Dec. 31, 2013 USD ($) | Dec. 31, 2012 USD ($) | Dec. 31, 2012 Option agreement [Member] USD ($) | Nov. 30, 2012 Minimum [Member] gal | Nov. 30, 2012 Maximum [Member] gal | May 15, 2014 N S C Agua [Member] USD ($) | Feb. 28, 2014 N S C Agua [Member] USD ($) | May 31, 2013 N S C Agua [Member] USD ($) | Nov. 30, 2012 N S C Agua [Member] USD ($) sqft | May 31, 2010 N S C Agua [Member] gal | Mar. 31, 2014 N S C Agua [Member] USD ($) | Dec. 31, 2014 N S C Agua [Member] USD ($) | Dec. 31, 2013 N S C Agua [Member] USD ($) ha | Dec. 31, 2012 N S C Agua [Member] USD ($) ha | Feb. 29, 2012 N S C Agua [Member] | Dec. 31, 2014 N S C Agua [Member] Mexican Tax Authority [Member] USD ($) | Dec. 31, 2014 N S C Agua [Member] Mexican Tax Authority [Member] MXN | Dec. 31, 2014 N S C Agua [Member] Mexican Tax Authority [Member] Letter of Credit [Member] MXN
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  |  |  |  |  |  |  |  |  | 50.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners / dei_LegalEntityAxis = cwco_NSCAguaMember |  |  |  |  |  |  |  |
Total Percentage Of Ownership Interest In An Acquired Company |  |  |  |  |  |  |  |  | 99.90%cwco_TotalPercentageOfOwnershipInterestInAcquiredCompany / dei_LegalEntityAxis = cwco_NSCAguaMember |  |  |  |  |  |  |  |  |  |
Seawater Reverse Osmosis Desalination Plant Per Day Processing Capacity |  |  |  |  |  |  |  |  |  |  | 100,000,000 cwco_SeawaterReverseOsmosisDesalinationPlantPerDayProcessingCapacity / dei_LegalEntityAxis = cwco_NSCAguaMember |  |  |  |  |  |  |  |
General and administrative expenses | $ 16,654,439 us-gaap_GeneralAndAdministrativeExpense | $ 15,844,303 us-gaap_GeneralAndAdministrativeExpense | $ 14,542,817 us-gaap_GeneralAndAdministrativeExpense |  |  |  |  |  |  |  |  |  | $ 3,700,000 us-gaap_GeneralAndAdministrativeExpense / dei_LegalEntityAxis = cwco_NSCAguaMember | $ 3,200,000 us-gaap_GeneralAndAdministrativeExpense / dei_LegalEntityAxis = cwco_NSCAguaMember | $ 1,700,000 us-gaap_GeneralAndAdministrativeExpense / dei_LegalEntityAxis = cwco_NSCAguaMember |  |  |  |
Payments to Acquire Land | 7,382,858 us-gaap_PaymentsToAcquireLand | 3,125,566 us-gaap_PaymentsToAcquireLand | 0 us-gaap_PaymentsToAcquireLand |  |  |  | 7,400,000 us-gaap_PaymentsToAcquireLand / dei_LegalEntityAxis = cwco_NSCAguaMember |  | 500,000 us-gaap_PaymentsToAcquireLand / dei_LegalEntityAxis = cwco_NSCAguaMember |  |  |  |  |  | 500,000 us-gaap_PaymentsToAcquireLand / dei_LegalEntityAxis = cwco_NSCAguaMember |  |  |  |
Further Required Payment As Compensation For Operation and Maintenance |  |  |  |  |  |  |  |  |  |  |  | 500,000 cwco_FurtherRequiredPaymentAsCompensationForOperationAndMaintenance / dei_LegalEntityAxis = cwco_NSCAguaMember |  |  |  |  |  |  |
Project Land Amount Paid |  |  |  |  |  |  | 10,000,000 cwco_ProjectLandAmountPaid / dei_LegalEntityAxis = cwco_NSCAguaMember |  |  |  |  |  |  |  |  |  |  |  |
Initial Amount Paid |  |  |  |  |  |  |  |  | 2,000,000 cwco_InitialAmountPaid / dei_LegalEntityAxis = cwco_NSCAguaMember |  |  |  |  |  |  |  |  |  |
Repayments of Short-term Debt |  |  |  |  |  |  |  |  | 5,700,000 us-gaap_RepaymentsOfShortTermDebt / dei_LegalEntityAxis = cwco_NSCAguaMember |  |  |  |  |  |  |  |  |  |
Lease Term |  |  |  |  |  |  |  |  |  | 20 years |  |  |  |  |  |  |  |  |
Assets | 160,459,831 us-gaap_Assets | 165,364,854 us-gaap_Assets |  |  |  |  |  |  |  |  |  |  | 22,000,000 us-gaap_Assets / dei_LegalEntityAxis = cwco_NSCAguaMember | 13,700,000 us-gaap_Assets / dei_LegalEntityAxis = cwco_NSCAguaMember |  |  |  |  |
Liabilities | 16,377,167 us-gaap_Liabilities | 23,866,481 us-gaap_Liabilities |  |  |  |  |  |  |  |  |  |  | 214,000 us-gaap_Liabilities / dei_LegalEntityAxis = cwco_NSCAguaMember | 10,300,000 us-gaap_Liabilities / dei_LegalEntityAxis = cwco_NSCAguaMember |  |  |  |  |
Payments for Compensation for Operation and Maintenance |  |  |  |  |  |  |  |  |  |  |  | 350,000 cwco_PaymentsForCompensationForOperationAndMaintenance / dei_LegalEntityAxis = cwco_NSCAguaMember |  |  |  |  |  |  |
Land Subject to Ground Leases |  |  |  |  |  |  |  |  |  | 5,000 us-gaap_LandSubjectToGroundLeases / dei_LegalEntityAxis = cwco_NSCAguaMember |  |  |  | 12 us-gaap_LandSubjectToGroundLeases / dei_LegalEntityAxis = cwco_NSCAguaMember | 8.1 us-gaap_LandSubjectToGroundLeases / dei_LegalEntityAxis = cwco_NSCAguaMember |  |  |  |
Operating Leases, Rent Expense per month |  |  |  |  |  |  |  |  |  | 20,000 cwco_OperatingLeasesRentExpensePerMonth / dei_LegalEntityAxis = cwco_NSCAguaMember |  |  |  |  |  |  |  |  |
Land |  |  |  |  |  |  |  |  | 12,000,000 us-gaap_Land / dei_LegalEntityAxis = cwco_NSCAguaMember |  |  |  |  |  |  |  |  |  |
Income Tax Examination, Estimate of Possible Loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 390,000 us-gaap_IncomeTaxExaminationEstimateOfPossibleLoss / us-gaap_IncomeTaxAuthorityNameAxis = us-gaap_MexicanTaxAuthorityMember / dei_LegalEntityAxis = cwco_NSCAguaMember | 5,737,457 us-gaap_IncomeTaxExaminationEstimateOfPossibleLoss / us-gaap_IncomeTaxAuthorityNameAxis = us-gaap_MexicanTaxAuthorityMember / dei_LegalEntityAxis = cwco_NSCAguaMember |
Loss Contingency, Estimate of Possible Loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,712,634 us-gaap_LossContingencyEstimateOfPossibleLoss / us-gaap_CreditFacilityAxis = us-gaap_LetterOfCreditMember / us-gaap_IncomeTaxAuthorityNameAxis = us-gaap_MexicanTaxAuthorityMember / dei_LegalEntityAxis = cwco_NSCAguaMember
Restricted Cash and Investments, Current | 456,083 us-gaap_RestrictedCashAndInvestmentsCurrent | 0 us-gaap_RestrictedCashAndInvestmentsCurrent |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Delivery Terms, Volume of water per day | 63,000,000 cwco_DeliveryTermsVolumeOfWaterPerDay |  |  |  | 20,000,000 cwco_DeliveryTermsVolumeOfWaterPerDay / us-gaap_RangeAxis = us-gaap_MinimumMember | 40,000,000 cwco_DeliveryTermsVolumeOfWaterPerDay / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of Voting Interest Acquired through Loan Conversion |  |  |  |  |  |  |  |  | 99.90%cwco_PercentageOfVotingInterestAcquiredThroughLoanConversion / dei_LegalEntityAxis = cwco_NSCAguaMember |  |  |  |  |  |  |  |  |  |
Percentage of Voting Interest Acquired through Option Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 25.00%cwco_PercentageOfVotingInterestAcquiredThroughOptionAgreement / dei_LegalEntityAxis = cwco_NSCAguaMember |  |  |
Payments for Stock Options Exercised |  |  |  |  |  |  |  | 1,000,000 cwco_PaymentsForStockOptionsExercised / dei_LegalEntityAxis = cwco_NSCAguaMember |  |  |  |  |  |  |  |  |  |  |
Payments to Enter Stock Option agreement |  |  |  | 300,000 cwco_PaymentsToEnterStockOptionAgreement / us-gaap_StatementClassOfStockAxis = cwco_OptionAgreementMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Option Agreement, Expiration Date |  |  |  | Feb. 07, 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Examination, Penalties Estimate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,639,001 cwco_IncomeTaxExaminationPenaltiesEstimate / us-gaap_IncomeTaxAuthorityNameAxis = us-gaap_MexicanTaxAuthorityMember / dei_LegalEntityAxis = cwco_NSCAguaMember |  |
Income Tax Examination, Interest Expense Estimate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 913,711 cwco_IncomeTaxExaminationInterestExpenseEstimate / us-gaap_IncomeTaxAuthorityNameAxis = us-gaap_MexicanTaxAuthorityMember / dei_LegalEntityAxis = cwco_NSCAguaMember |  |
Loss Contingency, Additional Estimated Loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 975,177 cwco_LossContingencyAdditionalEstimatedLoss / us-gaap_CreditFacilityAxis = us-gaap_LetterOfCreditMember / us-gaap_IncomeTaxAuthorityNameAxis = us-gaap_MexicanTaxAuthorityMember / dei_LegalEntityAxis = cwco_NSCAguaMember

X
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- Definition Represents the amount of Interest expense assessed by the Tax authority. + References No definition available. + Details
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- Definition Represents the amount of penalties assessed by the Tax authority. + References No definition available. + Details
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- Definition Represents the amount of initial payment made relating to project land cost during the reporting period. + References No definition available. + Details
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- Definition Represents the period of lease. + References No definition available. + Details
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- Definition Reflects the estimated additional amount of loss from the specified contingency as of the balance sheet date. + References No definition available. + Details
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- Definition Value of Rent expenses that are paid for each month. + References No definition available. + Details
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- Definition Amount of cash outflow associated with the stock options exercised by the entity. + References No definition available. + Details
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Balance Type: | credit
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- Definition Represents the amount spent to enter a stock option agreement. + References No definition available. + Details
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- Definition Percentage of voting interest acquired through loan converions. + References No definition available. + Details
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- Definition Percentage of voting interest acquired through Option agreements. + References No definition available. + Details
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- Definition The processing capacity per day seawater reverse osmosis desalination plant. + References No definition available. + Details
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Balance Type: | na
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- Definition Expiration date of the stock option agreement. + References No definition available. + Details
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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.18) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 18 -Article 5 + Details
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