Inventories

9 Months Ended

Sep. 30, 2017

Inventories

3. Inventories

Inventories are stated at the lower of average cost or market and consist of the following:

	September 30,		December 31,
	2017		2016
	(In thousands)
Raw materials	$	16,385	$	10,290
Work-in-progress		12,452		6,470
Finished goods		3,744		8,116
	$	32,581	$	24,876

Finished goods inventory consists primarily of completed systems that are undergoing installation and acceptance testing.