Asset Impairment - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($) Numbers	Dec. 31, 2023 USD ($)
Asset Impairment Charges [Line Items]
Impairment loss	$ 3,231	$ 1,586	$ 902
Proceeds received	1,000
Assets Deemed Obsolete or Non-Operable [Member]
Asset Impairment Charges [Line Items]
Impairment loss	555
Renewable Electricity Generation Site [Member]
Asset Impairment Charges [Line Items]
Impairment loss		312	125
Proceeds received		$ 1,000
Number of operating sites \| Numbers		1
Renewable Electricity Generation Site [Member] \| Construction work in progress [Member]
Asset Impairment Charges [Line Items]
Impairment loss	329
Renewable Electricity Generation Site [Member] \| Assets Deemed Obsolete or Non-Operable [Member]
Asset Impairment Charges [Line Items]
Impairment loss	120
Renewable Electricity Generation Site [Member] \| Inventory Valuation and Obsolescence [Member]
Asset Impairment Charges [Line Items]
Impairment loss		$ 102
Renewable Natural Gas [Member]
Asset Impairment Charges [Line Items]
Impairment loss			$ 777
Renewable Natural Gas [Member] \| Assets Deemed Obsolete or Non-Operable [Member]
Asset Impairment Charges [Line Items]
Impairment loss	2,676
Renewable Natural Gas [Member] \| Customer Contracts [Member]
Asset Impairment Charges [Line Items]
Impairment loss	432
Renewable Natural Gas [Member] \| Inventory Valuation and Obsolescence [Member]
Asset Impairment Charges [Line Items]
Impairment loss		$ 843
Corporate Segment and Other Operating Segment [Member] \| Assets Deemed Obsolete or Non-Operable [Member]
Asset Impairment Charges [Line Items]
Impairment loss	$ 3