Represents the volume of water that is supplied per day as per the agreement.

No definition available.

Name:	cwco_DeliveryTermsVolumeOfWaterPerDay
Namespace Prefix:	cwco_
Data Type:	num:volumeItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the compensation for operation and maintenance of equipment.

+ References

No definition available.

+ Details

Name:	cwco_FurtherRequiredPaymentAsCompensationForOperationAndMaintenance
Namespace Prefix:	cwco_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the amount of Interest expense assessed by the Tax authority.

+ References

No definition available.

+ Details

Name:	cwco_IncomeTaxExaminationInterestExpenseEstimate
Namespace Prefix:	cwco_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the amount of penalties assessed by the Tax authority.

+ References

No definition available.

+ Details

Name:	cwco_IncomeTaxExaminationPenaltiesEstimate
Namespace Prefix:	cwco_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the amount of initial payment made relating to project land cost during the reporting period.

+ References

No definition available.

+ Details

Name:	cwco_InitialAmountPaid
Namespace Prefix:	cwco_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the period of lease.

+ References

No definition available.

+ Details

Name:	cwco_LeaseTerm
Namespace Prefix:	cwco_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Reflects the estimated additional amount of loss from the specified contingency as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	cwco_LossContingencyAdditionalEstimatedLoss
Namespace Prefix:	cwco_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Value of Rent expenses that are paid for each month.

+ References

No definition available.

+ Details

Name:	cwco_OperatingLeasesRentExpensePerMonth
Namespace Prefix:	cwco_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the compensation for operation and maintenance of equipment paid.

+ References

No definition available.

+ Details

Name:	cwco_PaymentsForCompensationForOperationAndMaintenance
Namespace Prefix:	cwco_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of cash outflow associated with the stock options exercised by the entity.

+ References

No definition available.

+ Details

Name:	cwco_PaymentsForStockOptionsExercised
Namespace Prefix:	cwco_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the amount spent to enter a stock option agreement.

+ References

No definition available.

+ Details

Name:	cwco_PaymentsToEnterStockOptionAgreement
Namespace Prefix:	cwco_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percentage of voting interest acquired through loan converions.

+ References

No definition available.

+ Details

Name:	cwco_PercentageOfVotingInterestAcquiredThroughLoanConversion
Namespace Prefix:	cwco_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of voting interest acquired through Option agreements.

+ References

No definition available.

+ Details

Name:	cwco_PercentageOfVotingInterestAcquiredThroughOptionAgreement
Namespace Prefix:	cwco_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the amount paid relating to project land during the reporting period.

+ References

No definition available.

+ Details

Name:	cwco_ProjectLandAmountPaid
Namespace Prefix:	cwco_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The processing capacity per day seawater reverse osmosis desalination plant.

+ References

No definition available.

+ Details

Name:	cwco_SeawaterReverseOsmosisDesalinationPlantPerDayProcessingCapacity
Namespace Prefix:	cwco_
Data Type:	num:volumeItemType
Balance Type:	na
Period Type:	duration

- Definition

Expiration date of the stock option agreement.

+ References

No definition available.

+ Details

Name:	cwco_StockOptionAgreementExpirationDate
Namespace Prefix:	cwco_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Total Percentage of ownership interest acquired as of the period in an acquired company.

+ References

No definition available.

+ Details

Name:	cwco_TotalPercentageOfOwnershipInterestInAcquiredCompany
Namespace Prefix:	cwco_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- 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

Name:	us-gaap_Assets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.4)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

Name:	us-gaap_GeneralAndAdministrativeExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Estimated amount of loss resulting from an adverse tax position.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (d)(3)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

+ Details

Name:	us-gaap_IncomeTaxExaminationEstimateOfPossibleLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount before accumulated depletion of real estate held for productive use, excluding land held for sale.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 4

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6812-107765

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.13)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_Land
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Area of land subject to a ground lease.

+ References

No definition available.

+ Details

Name:	us-gaap_LandSubjectToGroundLeases
Namespace Prefix:	us-gaap_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future.

+ References

+ Details

Name:	us-gaap_Liabilities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 4

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 9

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349

+ Details

Name:	us-gaap_LossContingencyEstimateOfPossibleLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

+ Details

Name:	us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash outflow from the acquisition of real estate intended to generate income for the owner; excludes land acquired for use by the owner.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

+ Details

Name:	us-gaap_PaymentsToAcquireLand
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow for a borrowing having initial term of repayment within one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

+ Details

Name:	us-gaap_RepaymentsOfShortTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The current cash, cash equivalents and investments that are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. Includes current cash equivalents and investments that are similarly restricted as to withdrawal, usage or disposal.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 1

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.1)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_RestrictedCashAndInvestmentsCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_ScheduleOfInvestmentsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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
N.S.C. Agua, S.A. de C.V. (Details Textual)	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%
Total Percentage Of Ownership Interest In An Acquired Company									99.90%
Seawater Reverse Osmosis Desalination Plant Per Day Processing Capacity											100,000,000
General and administrative expenses	$ 16,654,439us-gaap_GeneralAndAdministrativeExpense	$ 15,844,303us-gaap_GeneralAndAdministrativeExpense	$ 14,542,817us-gaap_GeneralAndAdministrativeExpense										$ 3,700,000	$ 3,200,000	$ 1,700,000
Payments to Acquire Land	7,382,858us-gaap_PaymentsToAcquireLand	3,125,566us-gaap_PaymentsToAcquireLand	0us-gaap_PaymentsToAcquireLand				7,400,000		500,000						500,000
Further Required Payment As Compensation For Operation and Maintenance												500,000
Project Land Amount Paid							10,000,000
Initial Amount Paid									2,000,000
Repayments of Short-term Debt									5,700,000
Lease Term										20 years
Assets	160,459,831us-gaap_Assets	165,364,854us-gaap_Assets											22,000,000	13,700,000
Liabilities	16,377,167us-gaap_Liabilities	23,866,481us-gaap_Liabilities											214,000	10,300,000
Payments for Compensation for Operation and Maintenance												350,000
Land Subject to Ground Leases										5,000				12	8.1
Operating Leases, Rent Expense per month										20,000
Land									12,000,000
Income Tax Examination, Estimate of Possible Loss																	390,000	5,737,457
Loss Contingency, Estimate of Possible Loss																			6,712,634
Restricted Cash and Investments, Current	456,083	0
Delivery Terms, Volume of water per day	63,000,000cwco_DeliveryTermsVolumeOfWaterPerDay				20,000,000	40,000,000
Percentage of Voting Interest Acquired through Loan Conversion									99.90%
Percentage of Voting Interest Acquired through Option Agreement																25.00%
Payments for Stock Options Exercised								1,000,000
Payments to Enter Stock Option agreement				300,000
Stock Option Agreement, Expiration Date				Feb. 07, 2014
Income Tax Examination, Penalties Estimate																	1,639,001
Income Tax Examination, Interest Expense Estimate																	913,711
Loss Contingency, Additional Estimated Loss																			975,177