Accounts Payable and Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Accounts Payable and Accrued Liabilities [Line Items]
Accounts payable	$ 1,449	$ 4,830
Accrued payroll and related benefits	4,189	4,678
Total accounts payable and accrued liabilities	14,916	28,288
NW Lowa RNG
Accounts Payable and Accrued Liabilities [Line Items]
Accrued liabilities	8,800	18,345
Net Zero Segment
Accounts Payable and Accrued Liabilities [Line Items]
Other accrued liabilities	$ 478	$ 435