XML 38 R28.htm IDEA: XBRL DOCUMENT v3.21.1
Inventories (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Inventory Disclosure [Abstract]    
Finished products $ 2,749 $ 3,157
Feedstock, additives and chemicals 422 317
Inventories $ 3,171 $ 3,474