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Supplemental Balance Sheet Information - Other Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Balance Sheet Related Disclosures [Abstract]    
Catalyst and turnaround costs $ 687 $ 803
Other intangible assets 358 586
Other 1,153 1,416
Intangible and other assets, net $ 2,198 $ 2,805