Inventories

3 Months Ended

Mar. 31, 2019

Inventories

Inventories

4.  Inventories

Inventories consist of the following, in thousands of dollars:

	March 31,		December 31,
	2019		2018
	(unaudited)
Raw materials	$	5,377	$	5,742
Work in process		5,661		7,275
Finished goods		15,480		12,642
Total	$	26,518	$	25,659