Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Net Sales:
Customer sales	$ 9,572	$ 10,115
Intercompany sales
Total Net Sales	$ 9,572	$ 10,115
Segment income (loss)	244	(190)
Segments assets	37,775	44,113
United States (Corpus Christi) [Member]
Net Sales:
Customer sales	6,491	$ 7,070
Intercompany sales	53
Total Net Sales	6,544	$ 7,070
Segment income (loss)	(33)	(18)
Segments assets	15,967	18,192
European (TPT) [Member]
Net Sales:
Customer sales	2,435	2,307
Intercompany sales	1,360	952
Total Net Sales	3,795	3,259
Segment income (loss)	320	(93)
Segments assets	14,513	10,212
Asian (TMM) [Member]
Net Sales:
Customer sales	646	738
Intercompany sales	1,572	2,096
Total Net Sales	2,218	2,834
Segment income (loss)	41	(99)
Segments assets	$ 7,295	$ 15,709
Inter-Company Eliminations [Member]
Net Sales:
Customer sales
Intercompany sales	$ (2,985)	$ (3,048)
Total Net Sales	(2,985)	(3,048)
Segment income (loss)	$ (84)	$ 20
Segments assets