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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% |

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