INVENTORIES

12 Months Ended

Dec. 31, 2017

Classes of current inventories [abstract]

INVENTORIES

6. INVENTORIES

Inventories include the following components:

	As of		As of
	December 31, 2017		December 31, 2016
Stockpiled ore	$	22,998	$	23,833
In-process ore	4,014		5,008
Materials and supplies	22,677		14,824
Finished goods	964		716
Total	$	50,653	$	44,381

The cost of inventories expensed for the year ended December 31, 2017 and 2016 was $209.2 million and $160.5 million, respectively.

During the year ended December 31, 2017, $3.5 million of net realizable value adjustments were recorded for stockpiled ore (year ended December 31, 2016 - $1.2 million).