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Accounting policies - Goodwill and intangible assets (Details) | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2021 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) customer | Aug. 11, 2020 | Jan. 24, 2020
Goodwill |  | $ 10,425,013 | $ 13,325,013 |  |
Intangible assets, net |  | 3,401,666 | $ 4,148,333 |  |
Impairment of goodwill |  | 2,900,000 |  |  |
Unamortized balance of intangible assets |  | $ 3,401,666 |  |  |
Retail [Member] |  |  |  |  |
Estimated Fair Value Carrying Amount Exceeded Percentage |  | 32 | 101 |  |
Goodwill |  | $ 1,170,511 | $ 1,170,511 |  |
Bulk [Member] |  |  |  |  |
Estimated Fair Value Carrying Amount Exceeded Percentage |  | 51 | 49 |  |
Goodwill |  | $ 1,948,875 | $ 1,948,875 |  |
Services [Member] |  |  |  |  |
Estimated Fair Value Carrying Amount Exceeded Percentage |  | 15 | 17 |  |
Goodwill |  | $ 5,320,416 | $ 5,320,416 |  |
Intangible assets, net |  | $ 2,553,888 | $ 3,200,555 |  |
Manufacturing Units [Member] |  |  |  |  |
Estimated Fair Value Carrying Amount Exceeded Percentage |  | 15 | 31 |  |
Goodwill |  | $ 1,985,211 | $ 4,885,211 |  |
Intangible assets, net |  | $ 847,778 | $ 947,778 |  |
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 |  |  |  |  |
Ownership interest acquired |  |  |  |  | 49.00%
Number of customers | customer |  |  | 1 |  |
Aerex | Revenue Benchmark [Member] | Customer Concentration Risk [Member] |  |  |  |  |
Percentage of total |  |  | 80.00% |  |
Aerex | Gross Profit [Member] | Customer Concentration Risk [Member] |  |  |  |  |
Percentage of total |  |  | 89.00% |  |
Aerex | Manufacturing Units [Member] |  |  |  |  |
Estimated Fair Value Carrying Amount Exceeded Percentage |  | 15 |  |  |
Goodwill |  | $ 1,985,211 |  |  |
Intangible assets, net |  | $ 847,778 |  |  |
Impairment of goodwill | $ 2,900,000 |  |  |  |
Aerex | Discounted Cash Flow Method [Member] | Manufacturing Units [Member] |  |  |  |  |
Estimated Fair Value Percentage Segment Reporting Information | 80.00% |  | 80.00% |  |
Aerex | Guideline Public Company Method [Member] | Manufacturing Units [Member] |  |  |  |  |
Estimated Fair Value Percentage Segment Reporting Information | 20.00% |  | 20.00% |  |
PERC Water Corporation |  |  |  |  |
Ownership interest acquired |  |  |  | 10.00% |
PERC Water Corporation | Manufacturing Units [Member] |  |  |  |  |
Estimated Fair Value Carrying Amount Exceeded Percentage |  | 15 |  |  |
Goodwill |  | $ 5,320,416 |  |  |
Intangible assets, net |  | $ 2,553,888 |  |  |

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