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Other Assets (Details 1) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Investments $ 12,879 $ 19,205
Spare parts inventory 2,610 2,610
Catalysts 7,408 1,274
Deposits 552 552
Other 8,131 2,874
Total $ 31,580 $ 26,515