Inventories

3 Months Ended

Mar. 31, 2018

Inventory Disclosure [Abstract]

Inventories

7. Inventories

The components of inventories are as follows:

	March 31,		December 31,
	2018		2017
	(In thousands)
	(unaudited)
Finished goods	$	4,268	$	4,432
Raw materials		7,376		6,385
Total inventories	$	11,644	$	10,817