Contingencies (Details Textual) (USD $)	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Commitments And Contingencies [Line Items]
Revenues, Total	$ 14,666,112us-gaap_Revenues	$ 16,348,610us-gaap_Revenues
Goodwill	3,499,037us-gaap_Goodwill		3,499,037us-gaap_Goodwill
Cayman Water retail operations, Gross Profit Percentage	56.00%	55.00%
Cayman Water retail operations, Revenue Percentage	41.00%	37.00%
Ocean Conversion Cayman Limited [Member]
Commitments And Contingencies [Line Items]
Revenue, Net	726,000	994,000
Cw Bahamas [Member]
Commitments And Contingencies [Line Items]
Delivery Terms, Volume of water per day	16,800,000
CW-Bahamas Windsor Plant [Member]
Commitments And Contingencies [Line Items]
Revenues, Total	$ 1,500,000	$ 1,700,000

Represents the percentage of consolidated gross profit from Cayman Water retail operations.

No definition available.

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Namespace Prefix:	cwco_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage of consolidated revenue from Cayman Water retail operations.

+ References

No definition available.

+ Details

Name:	cwco_CaymanWaterRetailOperationsRevenuePercentage
Namespace Prefix:	cwco_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	cwco_CommitmentsAndContingenciesLineItems
Namespace Prefix:	cwco_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

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

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

+ Details

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

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ 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 210.5-03.1)

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

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

+ Details

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

- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

+ Details

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

- Details

Name:	us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=cwco_CwBahamasMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=cwco_CwbahamasWindsorPlantMember
Namespace Prefix:
Data Type:	na
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- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=cwco_OceanConversionCaymanLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: