15. Sales by Product

12 Months Ended

Dec. 31, 2017

Revenue Recognition [Abstract]

Sales by Product

Revenues from sales by product for the years ended December 31, 2017 and 2016 are as follows (in thousands):

Product	2017			2016			Variance
ALUPREM		14,958	38%		16,802	44%		(1,844	)	-11%
HITOX		9,349	24%		8,006	21%		1,343		17%
BARTEX / BARYPREM		8,383	22%		8,217	21%		166		2%
HALTEX / OPTILOAD		5,383	14%		4,364	11%		1,019		23%
TIOPREM		585	1%		742	2%		(157	)	-21%
OTHER		308	1%		325	1%		(17	)	-5%
Total		38,966	100%		38,456	100%		510		1%