Intangible assets (Tables)

12 Months Ended

Dec. 31, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Finite-Lived Intangible Assets [Table Text Block]

	December 31,
	2016		2015
Cost
Intangible asset management service agreement	$	856,356	$	856,356
Belize water production and supply agreement		1,522,419		1,522,419
Aerex - Non-compete agreement		400,000		-
Aerex - Trade name		1,400,000		-
Aerex - Certifications/programs		2,000,000		-
Aerex - Customer backlog		100,000		-
Aerex - Customer relationships		2,000,000		-
		8,278,775		2,378,775
Accumulated amortization
Intangible asset management service agreement		(840,839)		(750,697)
Belize water production and supply agreement		(922,460)		(856,267)
Aerex - Non-compete agreement		(73,333)		-
Aerex - Trade name		(85,556)		-
Aerex - Certifications/programs		(611,111)		-
Aerex - Customer backlog		(91,667)		-
Aerex - Customer relationships		(458,333)		-
		(3,083,299)		(1,606,964)
Intangible assets, net	$	5,195,476	$	771,811

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

Amortization of intangible assets for each of the next five years and thereafter is expected to be as follows:

2017	$	1,430,042
2018		1,406,192
2019		795,081
2020		281,192
2021		166,192
Thereafter		1,116,777
	$	5,195,476