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

The processing capacity per day seawater reverse osmosis desalination plant.

No definition available.

Name:	cwco_SeawaterReverseOsmosisDesalinationPlantPerDayProcessingCapacity
Namespace Prefix:	cwco_
Data Type:	dtr-types:volumeItemType
Balance Type:	na
Period Type:	duration