Quarterly report pursuant to Section 13 or 15(d)

Other Assets (Details 1)

v3.19.2
Other Assets (Details 1) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Cost Method Investments $ 14,256 $ 13,053
Spare parts inventory 2,680 2,680
Catalysts 1,632 1,989
Deposits 552 381
Other 2,346 3,167
Total $ 21,466 $ 21,270