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The percentage of total interest in subsidiary after considering the effect of the profit sharing.

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Represents the equity method investments voting shares percentage.

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Amount of due from plaintiff in legal settlement recovery.

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Principle amount of due from the plaintiff as on the date specified.

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Plant capacity in gallons per day.

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This item represents the entity's share of profit or (loss) from its unconsolidated equity method investee.

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Represents the agreed-upon purchase price for the Baughers Bay plant under the 1990 Agreement.

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Difference between amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and amount of underlying equity in net assets the reporting Entity has in the investee.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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Amount of damages awarded to the plaintiff in the legal matter.

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Cash received for the settlement of litigation during the current period.

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Investment in OC-BVI (Details Textual) (USD $)	3 Months Ended	12 Months Ended			108 Months Ended	3 Months Ended	12 Months Ended		42 Months Ended
Investment in OC-BVI (Details Textual) (USD $)	Dec. 31, 2014 gal	Dec. 31, 2014 gal	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2003	Dec. 31, 2009	Dec. 31, 2011	Dec. 31, 2010	Jun. 30, 2012	Dec. 31, 2007 gal	Mar. 04, 2010 gal
Schedule of Investments [Line Items]
Equity Method Investment, Ownership Percentage	43.50%	43.50%
Equity Method Investments Voting Shares Percentage	50.00%	50.00%
Equity Method Investment, Interest In Profit Percentage	45.00%	45.00%
Delivery Terms, Volume of water per day	63,000,000cwco_DeliveryTermsVolumeOfWaterPerDay	63,000,000cwco_DeliveryTermsVolumeOfWaterPerDay
Other than Temporary Impairment Losses, Investments	$ 860,000us-gaap_ImpairmentOfInvestments
Equity Method Investments	5,208,603us-gaap_EquityMethodInvestments	5,208,603us-gaap_EquityMethodInvestments	6,623,448us-gaap_EquityMethodInvestments
Intangible assets, net	927,900	927,900	1,096,488
Income (Loss) from Equity Method Investments		303,380	979,716	2,121,319
Profit Loss From Subsidiaries		111,375cwco_ProfitLossFromSubsidiaries	357,636cwco_ProfitLossFromSubsidiaries	343,454cwco_ProfitLossFromSubsidiaries
Sales Revenue, Services, Net		2,253,135us-gaap_SalesRevenueServicesNet	843,413us-gaap_SalesRevenueServicesNet	469,625us-gaap_SalesRevenueServicesNet
Property, Plant and Equipment, Net	56,396,988us-gaap_PropertyPlantAndEquipmentNet	56,396,988us-gaap_PropertyPlantAndEquipmentNet	58,602,886us-gaap_PropertyPlantAndEquipmentNet
Bar Bay plant [Member]
Schedule of Investments [Line Items]
Property, Plant and Equipment, Net	5,100,000	5,100,000
1990 Agreement [Member]
Schedule of Investments [Line Items]
Cost to Expand Production Capacity of Plant					4,700,000
Proceeds from Legal Settlements				4,700,000
Plant Capacity						1,700,000				720,000
Bar Bay Agreement [Member]
Schedule of Investments [Line Items]
Delivery Terms, Volume of water per day											600,000
Management Service [Member]
Schedule of Investments [Line Items]
Intangible assets, net	196,000	196,000	285,000
Ocean Conversion (BVI) Ltd [Member]
Schedule of Investments [Line Items]
Equity Method Investments	5,200,000	5,200,000
Loss Contingency, Damages Awarded, Value				10,400,000
Proceeds from Legal Settlements			2,000,000			2,000,000	1,000,000	2,000,000
Loss Contingency, Damages Paid, Value									5,000,000
Legal Settlement Recovery Principle Amount Due				5,400,000
Legal Settlement Recovery Due				6,700,000
Income (Loss) from Equity Method Investments		303,380	979,716	2,121,319
Profit Loss From Subsidiaries		111,375	357,636	343,454
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity	2,000,000	2,000,000
Ocean Conversion (BVI) Ltd [Member] \| Management Service [Member]
Schedule of Investments [Line Items]
Sales Revenue, Services, Net		747,340	784,626	469,625
Baughers Bay [Member]
Schedule of Investments [Line Items]
Purchase Price Agreed for Plant Under Agreement	$ 1,420,000	$ 1,420,000							$ 1,420,000