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v3.21.2

Accounting policies - Goodwill and intangible assets (Details) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2021 USD ($) customer | Jun. 30, 2021 USD ($) customer | Dec. 31, 2020 USD ($) customer
Goodwill | $ 10,425,013 | $ 10,425,013 | $ 13,325,013
Retail [Member] |  |  |
Estimated Fair Value Percentage Segment Reporting Information |  |  | 100.00%
Estimated Fair Value Carrying Amount Exceeded Percentage |  |  | 101
Goodwill | 1,170,511 | 1,170,511 | $ 1,170,511
Bulk [Member] |  |  |
Estimated Fair Value Percentage Segment Reporting Information |  |  | 100.00%
Estimated Fair Value Carrying Amount Exceeded Percentage |  |  | 49
Goodwill | 1,948,875 | 1,948,875 | $ 1,948,875
Services [Member] |  |  |
Estimated Fair Value Percentage Segment Reporting Information |  |  | 100.00%
Estimated Fair Value Carrying Amount Exceeded Percentage |  |  | 17
Goodwill | 5,320,416 | 5,320,416 | $ 5,320,416
Manufacturing Units [Member] |  |  |
Estimated Fair Value Percentage Segment Reporting Information |  |  | 100.00%
Estimated Fair Value Carrying Amount Exceeded Percentage |  |  | 31
Goodwill | $ 1,985,211 | $ 1,985,211 | $ 4,885,211
Discounted Cash Flow Method [Member] | Retail [Member] |  |  |
Estimated Fair Value Percentage Segment Reporting Information |  |  | 80.00%
Discounted Cash Flow Method [Member] | Bulk [Member] |  |  |
Estimated Fair Value Percentage Segment Reporting Information |  |  | 80.00%
Discounted Cash Flow Method [Member] | Services [Member] |  |  |
Estimated Fair Value Percentage Segment Reporting Information |  |  | 80.00%
Discounted Cash Flow Method [Member] | Manufacturing Units [Member] |  |  |
Estimated Fair Value Percentage Segment Reporting Information |  |  | 80.00%
Guideline Public Company Method [Member] | Retail [Member] |  |  |
Estimated Fair Value Percentage Segment Reporting Information |  |  | 20.00%
Guideline Public Company Method [Member] | Bulk [Member] |  |  |
Estimated Fair Value Percentage Segment Reporting Information |  |  | 20.00%
Guideline Public Company Method [Member] | Services [Member] |  |  |
Estimated Fair Value Percentage Segment Reporting Information |  |  | 20.00%
Guideline Public Company Method [Member] | Manufacturing Units [Member] |  |  |
Estimated Fair Value Percentage Segment Reporting Information |  |  | 20.00%
Aerex |  |  |
Number of customers | customer | 1 | 1 | 1
Aerex | Revenue Benchmark [Member] | Customer Concentration Risk [Member] |  |  |
Percentage of total | 87.00% | 86.00% | 80.00%
Aerex | Gross Profit [Member] | Customer Concentration Risk [Member] |  |  |
Percentage of total | 91.00% | 84.00% | 89.00%
Aerex | Manufacturing Units [Member] |  |  |
Estimated Fair Value Carrying Amount Exceeded Percentage |  |  | 31
Goodwill | $ 1,985,211 | $ 1,985,211 |
Impairment of goodwill | 2,900,000 |  |
Unamortized balance of intangible assets | $ 894,444 | $ 894,444 |
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%

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