Quarterly report pursuant to Section 13 or 15(d)

Other Assets (Details 1)

v3.21.2
Other Assets (Details 1) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Investments $ 14,520 $ 13,005
Spare parts inventory 2,567 2,610
Catalysts 14,985 7,408
Deposits 357 451
Other 11,583 9,246
Total $ 44,012 $ 32,720