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Accounting policies - Goodwill and intangible assets (Details) - USD ($) | 1 Months Ended | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jan. 31, 2023 | Jun. 30, 2021 | Dec. 31, 2022 | Dec. 31, 2020 | Dec. 31, 2023 | Jan. 04, 2023
Goodwill |  |  | $ 10,425,013 |  | $ 12,861,404 |
Intangible assets, net |  |  | 2,818,888 |  | 3,353,185 |
Retail [Member] |  |  |  |  |  |
Goodwill |  |  | 1,170,511 |  | 1,170,511 |
Bulk [Member] |  |  |  |  |  |
Goodwill |  |  | 1,948,875 |  | 1,948,875 |
Services [Member] |  |  |  |  |  |
Goodwill |  |  | 5,320,416 |  | 7,756,807 |
Intangible assets, net |  |  | 2,064,444 |  | 2,692,074 |
Manufacturing Units [Member] |  |  |  |  |  |
Goodwill |  |  | 1,985,211 |  | 1,985,211 |
Intangible assets, net |  |  | $ 754,444 |  | $ 661,111 |
Aerex | Manufacturing Units [Member] |  |  |  |  |  |
Estimated Fair Value Carrying Amount Exceeded Percentage |  |  | 63 | 31 |  |
Estimated Fair Value carrying Amount Exceeded Value |  | $ 2,900,000 |  |  |  |
Aerex | Discounted Cash Flow Method [Member] | Manufacturing Units [Member] |  |  |  |  |  |
Estimated Fair Value Percentage Segment Reporting Information |  | 80.00% | 80.00% | 80.00% |  |
Aerex | Guideline Public Company Method [Member] | Manufacturing Units [Member] |  |  |  |  |  |
Estimated Fair Value Percentage Segment Reporting Information |  | 20.00% | 20.00% | 20.00% |  |
PERC Water Corporation |  |  |  |  |  |
Ownership interest acquired | 39.00% |  |  |  |  | 39.00%
Amount of consideration paid | $ 2,400,000 |  |  |  |  |
Estimated Fair Value Percentage Segment Reporting Information |  |  | 79.00% |  |  |

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