Accounts Payable and Accrued Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Accounts Payable and Accrued Liabilities [Line Items]
Accounts payable	$ 1,936	$ 5,009
Accrued payroll and related benefits	3,716	5,105
Total accounts payable and accrued liabilities	21,365	24,760
NW Lowa RNG
Accounts Payable and Accrued Liabilities [Line Items]
Accrued liabilities	15,713	12,594
Net Zero Segment
Accounts Payable and Accrued Liabilities [Line Items]
Accrued sales and use tax	$ 0	$ 2,052