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Loans receivable (Details) (USD $) | Dec. 31, 2014 | Dec. 31, 2013
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Notes And Loans Receivable Gross | $ 7,337,177 cwco_NotesAndLoansReceivableGross | $ 9,028,279 cwco_NotesAndLoansReceivableGross
Less current portion | 1,726,310 us-gaap_NotesAndLoansReceivableNetCurrent | 1,691,102 us-gaap_NotesAndLoansReceivableNetCurrent
Loans receivable, excluding current portion | 5,610,867 us-gaap_NotesAndLoansReceivableNetNoncurrent | 7,337,177 us-gaap_NotesAndLoansReceivableNetNoncurrent
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] |  |
Notes And Loans Receivable Gross | 5,831,504 cwco_NotesAndLoansReceivableGross / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cwco_LoanSixPointFiveSecuredByMachineryAndEquipmentOfNorthSideWaterWorksPlantMember | 6,912,337 cwco_NotesAndLoansReceivableGross / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cwco_LoanSixPointFiveSecuredByMachineryAndEquipmentOfNorthSideWaterWorksPlantMember
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] |  |
Notes And Loans Receivable Gross | 0 cwco_NotesAndLoansReceivableGross / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cwco_LoanFiveSecuredByMachineryAndEquipmentOfNorthSoundPlantMember | 73,084 cwco_NotesAndLoansReceivableGross / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cwco_LoanFiveSecuredByMachineryAndEquipmentOfNorthSoundPlantMember
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] |  |
Notes And Loans Receivable Gross | $ 1,505,673 cwco_NotesAndLoansReceivableGross / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cwco_LoanSixPointFiveSecuredByMachineryAndEquipmentOfRedGatePlantMember | $ 2,042,858 cwco_NotesAndLoansReceivableGross / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cwco_LoanSixPointFiveSecuredByMachineryAndEquipmentOfRedGatePlantMember

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- Definition An amount representing an agreement for an unconditional promise by the maker to pay the Entity (holder) a definite sum of money at a future date. This amount does not include amounts related to receivables held-for-sale. + References No definition available. + Details
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- Definition An amount representing an agreement for an unconditional promise by the maker to pay the Company (holder) a definite sum of money within one year from the balance sheet date (or the normal operating cycle, whichever is longer), net of any write-downs taken for collection uncertainty on the part of the holder. Such amount may include accrued interest receivable in accordance with the terms of the debt. The debt also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. This amount does not include amounts related to receivables held-for-sale. + 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 210.5-02.3) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4531-111522 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 + Details
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- Definition An amount representing an agreement for an unconditional promise by the maker to pay the Entity (holder) a definite sum of money at a future date more than one year from the balance sheet date, net of any write-downs taken for collection uncertainty on the part of the holder. Such amount may include accrued interest receivable in accordance with the terms of the debt. The debt also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. This amount does not include amounts related to receivables held-for-sale. + 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 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 17 -Article 5 + Details
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