Summary of significant accounting policies - Schedule of Property, Plant and Equipment Useful Lives (Details)	Dec. 31, 2023
Computer equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	3 years
Vehicles
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years
Plant equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years
Furniture
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	7 years
Storage containers
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	10 years
Processing equipment and rotable parts | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years
Processing equipment and rotable parts | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	10 years
Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	49 years