Sales by Product (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Product Information [Line Items]
Total Sales	$ 7,993	$ 8,988	$ 9,963	$ 10,115	$ 9,889	$ 11,317	$ 12,392	$ 13,132	$ 37,059	$ 46,730
Revenues from sales by product, percentage									100.00%	100.00%
ALUPREM [Member]
Product Information [Line Items]
Total Sales									$ 13,319	$ 18,516
Revenues from sales by product, percentage									36.00%	39.00%
HITOX [Member]
Product Information [Line Items]
Total Sales									$ 10,392	$ 13,265
Revenues from sales by product, percentage									28.00%	28.00%
BARTEX / BARYPREM [Member]
Product Information [Line Items]
Total Sales									$ 8,417	$ 8,848
Revenues from sales by product, percentage									23.00%	20.00%
HALTEX / OPTILOAD [Member]
Product Information [Line Items]
Total Sales									$ 3,462	$ 3,182
Revenues from sales by product, percentage									9.00%	7.00%
TIOPREM [Member]
Product Information [Line Items]
Total Sales									$ 718	$ 856
Revenues from sales by product, percentage									2.00%	2.00%
SR [Member]
Product Information [Line Items]
Total Sales									$ 14	$ 1,365
Revenues from sales by product, percentage									1.00%	3.00%
OTHER [Member]
Product Information [Line Items]
Total Sales									$ 737	$ 698
Revenues from sales by product, percentage									2.00%	1.00%