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Loans receivable (Details Textual) (USD $) | 12 Months Ended
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Dec. 31, 2014
Two loans originally aggregating $10,996,290, bearing interest at 6.5% per annum, receivable in aggregate monthly installments of $124,827 to May 2019, and secured by the machinery and equipment of the North Side Water Works plant [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans Receivable Face Amount | $ 10,996,290 cwco_LoansReceivableFaceAmount / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cwco_LoanOneSecuredByMachineryAndEquipmentOfNorthSideWaterWorksPlantMember
Loans Receivable Interest Rate Stated Percentage | 6.50%cwco_LoansReceivableInterestRateStatedPercentage / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cwco_LoanOneSecuredByMachineryAndEquipmentOfNorthSideWaterWorksPlantMember
Loans Receivable Monthly Installment | 124,827 cwco_LoansReceivableMonthlyInstalment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cwco_LoanOneSecuredByMachineryAndEquipmentOfNorthSideWaterWorksPlantMember
Loans Receivable Maturity Date | 2019-05-31
Two loans originally aggregating $1,738,000, bearing interest at 5% per annum, receivable in aggregate monthly installments of $24,565 to March 2014, and secured by the machinery and equipment of the North Sound plant [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans Receivable Face Amount | 1,738,000 cwco_LoansReceivableFaceAmount / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cwco_LoanTwoSecuredByMachineryAndEquipmentOfNorthSoundPlantMember
Loans Receivable Interest Rate Stated Percentage | 5.00%cwco_LoansReceivableInterestRateStatedPercentage / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cwco_LoanTwoSecuredByMachineryAndEquipmentOfNorthSoundPlantMember
Loans Receivable Monthly Installment | 24,565 cwco_LoansReceivableMonthlyInstalment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cwco_LoanTwoSecuredByMachineryAndEquipmentOfNorthSoundPlantMember
Loans Receivable Maturity Date | 2014-03-31
Two loans originally aggregating $3,671,039, bearing interest at 6.5% per annum, receivable in aggregate monthly installments of $54,513 to June 2017, and secured by the machinery and equipment of the Red Gate plant [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans Receivable Face Amount | 3,671,039 cwco_LoansReceivableFaceAmount / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cwco_LoanThreeSecuredByMachineryAndEquipmentOfRedGatePlantMember
Loans Receivable Interest Rate Stated Percentage | 6.50%cwco_LoansReceivableInterestRateStatedPercentage / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cwco_LoanThreeSecuredByMachineryAndEquipmentOfRedGatePlantMember
Loans Receivable Monthly Installment | $ 54,513 cwco_LoansReceivableMonthlyInstalment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cwco_LoanThreeSecuredByMachineryAndEquipmentOfRedGatePlantMember
Loans Receivable Maturity Date | 2017-06-30

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- Definition The stated principal amount of the loans receivable. + References No definition available. + Details
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Namespace Prefix: | cwco_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Interest rate stated in the contractual loans receivable agreement. + References No definition available. + Details
Name: | cwco_LoansReceivableInterestRateStatedPercentage
Namespace Prefix: | cwco_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Date when the loans receivable is scheduled to be fully received, in CCYY-MM-DD format. + References No definition available. + Details
Name: | cwco_LoansReceivableMaturityDate
Namespace Prefix: | cwco_
Data Type: | xbrli:dateTimeItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of the monthly installments receivables including both interest and principal. + References No definition available. + Details
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Namespace Prefix: | cwco_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
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- Details
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- Details
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