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Goodwill
9 Months Ended
Sep. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill
6. Goodwill:
The change in the carrying amount of goodwill for the nine months ended September 30, 2023 is summarized as follows:
 EcoservicesCatalyst TechnologiesTotal
Balance as of December 31, 2022$326,589 $76,574 $403,163 
Foreign exchange impact— 205 205 
Balance as of September 30, 2023$326,589 $76,779 $403,368