Segment information (Details 1) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Revenues	$ 65,719,857	$ 59,367,022
Cayman Islands [Member]
Segment Reporting Information [Line Items]
Revenues	34,623,925	30,218,830
Bahamas [Member]
Segment Reporting Information [Line Items]
Revenues	23,241,361	21,528,494
Indonesia [Member]
Segment Reporting Information [Line Items]
Revenues	153,233	159,856
Management Services Agreement With OC-BVI [Membre]
Segment Reporting Information [Line Items]
Revenues	445,188	469,346
Water and Sewerage Corporation of the Bahamas [Member]
Segment Reporting Information [Line Items]
Revenues	$ 22,956,878	$ 21,307,993
Percentage of total revenues	35.00%	36.00%
Water Authority - Cayman [Member]
Segment Reporting Information [Line Items]
Revenues	$ 7,789,926	$ 7,153,620
Percentage of total revenues	12.00%	12.00%
United States [Member]
Segment Reporting Information [Line Items]
Revenues	$ 7,256,150	$ 6,990,496