Inventories

6 Months Ended

Jun. 30, 2019

Inventory Disclosure [Abstract]

Inventories

Inventories

The major components of inventories were as follows:

	June 30, 2019		December 31, 2018
Petroleum products	$	13,884	$	12,203
Crude oil	21,231		8,379
Caustic soda	6,856		10,372
NaHS	7,277		12,400
Raw materials - Alkali operations	7,457		5,952
Work-in-process - Alkali operations	5,081		2,322
Finished goods, net - Alkali operations	11,172		11,402
Materials and supplies, net - Alkali operations	11,079		10,490
Other	57		11
Total	$	84,094	$	73,531

Inventories are valued at the lower of cost or net realizable value. The net realizable value of inventories were not recorded below cost as of June 30, 2019 and were recorded below cost by $1.0 million as of December 31, 2018.