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Accounting policies - Additional Information (Details) gal in Millions | Jun. 02, 2023 gal
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Kalaeloa Desalco |
Amount of seawater reverse osmosis desalination plant | 1.7

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- Definition The processing capacity per day seawater reverse osmosis desalination plant. + References No definition available. + Details
Name: | cwco_SeawaterReverseOsmosisDesalinationPlantPerDayProcessingCapacity
Namespace Prefix: | cwco_
Data Type: | dtr-types:volumeItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | srt_OwnershipAxis=cwco_KalaeloaDesalcoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |