Accounting policies (Tables)

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Schedule Of Property Plant And Equipment Useful Life [Table Text Block]

Rates are determined based on the estimated useful lives of the assets as follows:

Buildings	5 to 40 years
Plant and equipment	4 to 40 years
Distribution system	3 to 40 years
Office furniture, fixtures and equipment	3 to 10 years
Vehicles	3 to 10 years
Leasehold improvements	Shorter of 5 years or lease term
Lab equipment	5 to 10 years

Estimated Fair value Of Reporting Segment [Table Text Block]

The respective weightings the Company applied to each method as of December 31, 2018 were consistent with those used as of December 31, 2017 and were as follows:

Method	Retail			Bulk			Manufacturing
Discounted cash flow		80	%		80	%		80	%
Guideline public company		10	%		10	%		10	%
Mergers and acquisitions		10	%		10	%		10	%
		100	%		100	%		100	%

Disaggregation of Revenue [Table Text Block]

The following table presents the Company’s revenues disaggregated by revenue source.

	Year Ended December 31,
	2018		2017
Retail revenues	$	25,621,048	$	23,225,066
Bulk revenues		31,031,287		28,682,113
Services revenues		1,811,372		469,347
Manufacturing revenues		7,256,150		6,990,496
Total Revenues	$	65,719,857	$	59,367,022