Accounting policies - Goodwill and intangible assets (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Jun. 30, 2023
Goodwill	$ 10,425,013	$ 10,425,013
Intangible assets, net	2,818,888	2,545,556
Retail [Member]
Goodwill	1,170,511	1,170,511
Bulk [Member]
Goodwill	1,948,875	1,948,875
Services [Member]
Goodwill	5,320,416	5,320,416
Intangible assets, net	2,064,444	1,837,778
Manufacturing Units [Member]
Goodwill	1,985,211	1,985,211
Intangible assets, net	$ 754,444	$ 707,778
Discounted Cash Flow Method [Member]
Estimated Fair Value Percentage Segment Reporting Information	80.00%
Guideline Public Company Method [Member]
Estimated Fair Value Percentage Segment Reporting Information	20.00%
Aerex | Manufacturing Units [Member]
Estimated Fair Value Carrying Amount Exceeded Percentage	63
PERC Water Corporation
Estimated Fair Value Percentage Segment Reporting Information	79.00%