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Accounting policies - Goodwill and intangible assets (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Mar. 31, 2023
Goodwill | $ 10,425,013 | $ 10,425,013
Intangible assets, net | 2,818,888 | 2,682,222
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 | 1,951,111
Manufacturing Units [Member] |  |
Goodwill | 1,985,211 | 1,985,211
Intangible assets, net | $ 754,444 | $ 731,111
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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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)(1)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 55 -Paragraph 24 -URI https://asc.fasb.org/extlink&oid=122137925&loc=d3e14258-109268 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(15)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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