Inventories

9 Months Ended

Sep. 30, 2019

Inventory Disclosure [Abstract]

Inventories

Inventories

The major components of inventories were as follows:

	September 30, 2019		December 31, 2018
Petroleum products	$	2,752	$	12,203
Crude oil	15,320		8,379
Caustic soda	6,856		10,372
NaHS	8,887		12,400
Raw materials - Alkali operations	6,896		5,952
Work-in-process - Alkali operations	7,437		2,322
Finished goods, net - Alkali operations	12,788		11,402
Materials and supplies, net - Alkali operations	11,151		10,490
Other	—		11
Total	$	72,087	$	73,531

Inventories are valued at the lower of cost or net realizable value. The net realizable value of inventories were $0.3 million recorded below cost as of September 30, 2019 and were recorded below cost by $1.0 million as of December 31, 2018.