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Cost of revenues and general and administrative expenses - Cost of revenues (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Cost of revenues and general and administrative expenses [Line Items] |  |
Cost of revenue | $ 118,284,128 | $ 63,749,849
Subcontractor and other project costs |  |
Cost of revenues and general and administrative expenses [Line Items] |  |
Cost of revenue | 64,806,072 | 17,847,124
Employee costs [Member] |  |
Cost of revenues and general and administrative expenses [Line Items] |  |
Cost of revenue | 18,935,014 | 14,036,117
Fuel oil [Member] |  |
Cost of revenues and general and administrative expenses [Line Items] |  |
Cost of revenue | 9,502,666 | 6,975,129
Electricity [Member] |  |
Cost of revenues and general and administrative expenses [Line Items] |  |
Cost of revenue | 9,024,836 | 10,203,690
Maintenance [Member] |  |
Cost of revenues and general and administrative expenses [Line Items] |  |
Cost of revenue | 5,632,998 | 5,261,463
Insurance [Member] |  |
Cost of revenues and general and administrative expenses [Line Items] |  |
Cost of revenue | 2,992,872 | 2,786,258
Retail license royalties [Member] |  |
Cost of revenues and general and administrative expenses [Line Items] |  |
Cost of revenue | 2,061,497 | 1,782,333
Cost of plant sales [Member] |  |
Cost of revenues and general and administrative expenses [Line Items] |  |
Cost of revenue | 1,842,924 | 1,590,250
Other [Member] |  |
Cost of revenues and general and administrative expenses [Line Items] |  |
Cost of revenue | $ 3,485,249 | $ 3,267,485

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