Leases, Right-of-Use Assets and Related Liabilities - Narrative (Details) $ in Thousands	1 Months Ended	9 Months Ended
	Jun. 30, 2022 USD ($)	Sep. 30, 2022 USD ($) contract site	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Leases [Abstract]
Operating right-of-use assets		$ 1,671		$ 2,414
Total lease liabilities		2,164
Operating lease liabilities (current)		430		772
Operating lease liabilities (long-term)		$ 1,734		$ 1,902
Number of finance lease | contract		4
Number of digester sites | site		3
Right-of-use asset purchased with financing leases		$ 834	$ 28,416
Increase of right-of-use-asset due to lease modification	$ 800
Increase of lease liability due to lease modification	$ 800