Segment information (Details 1) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Revenues	$ 62,306,665	$ 57,875,707	$ 57,116,202
Cayman Islands [Member]
Segment Reporting Information [Line Items]
Revenues	30,218,830	31,211,705	32,735,215
Bahamas [Member]
Segment Reporting Information [Line Items]
Revenues	21,528,494	19,554,944	21,062,081
Indonesia [Member]
Segment Reporting Information [Line Items]
Revenues	159,856	91,311	368,012
Belize [Member]
Segment Reporting Information [Line Items]
Revenues	2,939,643	2,614,989	2,422,547
Management Services Agreement With OC-BVI [Membre]
Segment Reporting Information [Line Items]
Revenues	469,346	515,474	528,347
Water and Sewerage Corporation of the Bahamas [Member]
Segment Reporting Information [Line Items]
Revenues	$ 21,307,993	$ 19,254,396	$ 20,770,347
Percentage of total revenues	34.00%	33.00%	36.00%
Water Authority - Cayman [Member]
Segment Reporting Information [Line Items]
Revenues	$ 7,153,620	$ 7,477,101	$ 8,369,627
Percentage of total revenues	11.00%	13.00%	15.00%
United States [Member]
Segment Reporting Information [Line Items]
Revenues	$ 6,990,496	$ 3,887,284	$ 0