Cost of revenues and general and administrative expenses - Cost of revenues (Details) - USD ($)	12 Months Ended
	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