Inventory

6 Months Ended

Jun. 30, 2019

Inventory [Abstract]

Inventory

(3)Inventory

Inventories are stated at the lower of cost or net realizable value. The Company applies net realizable value and obsolescence to the gross value of the inventory. Cost is determined using the first-in, first-out or weighted-average cost methods for finished goods and work-in-process. Supplies and consumables primarily consist of products used in our services provided to customers. The components of the inventory balances are as follows (in thousands):

	June 30, 2019		December 31, 2018
Finished goods	$	60,425	$	54,144
Raw materials		15,802		16,795
Work-in-process		11,089		5,544
Supplies and consumables		33,663		30,822
Total	$	120,979	$	107,305