Discontinued operations - Mexico project development - Financial Information (Details) - USD ($)	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Discontinued operations - Mexico project development
Loss from discontinued operations	$ (133,081)	$ (467,066)

Amount of income (loss) from a discontinued operation.

No definition available.

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