Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Net Sales:
Customer sales									$ 46,730	$ 46,021
Intercompany sales
Total Net Sales	9,889	11,317	12,392	13,132	12,992	10,870	10,732	11,427	46,730	46,021
Share based compensation									128	109
Depreciation									3,445	3,157
Interest expense	(79)	(85)	(95)	(95)	(103)	(103)	(99)	(84)	354	389
Income tax (benefit) expense	(474)	61	34	192	(891)	33	65	(31)	(187)	(824)
Location profit (loss)	(1,710)	296	153	707	(1,804)	113	150	(75)	(554)	(1,616)
Capital expenditures									2,064	4,230
Location long-lived assets	18,889				23,799				18,889	23,799
Location assets	48,163				52,855				48,163	52,855
United States (Corpus Christi) [Member]
Net Sales:
Customer sales									31,777	30,019
Intercompany sales									111	110
Total Net Sales									31,888	30,129
Share based compensation									128	109
Depreciation									980	936
Interest expense									34	77
Income tax (benefit) expense									120	(511)
Location profit (loss)									(41)	(1,132)
Capital expenditures									804	703
Location long-lived assets	5,627				5,805				5,627	5,805
Location assets	18,983				17,956				18,983	17,956
Netherlands (TPT) [Member]
Net Sales:
Customer sales									10,154	8,255
Intercompany sales									7,977	6,627
Total Net Sales									18,131	14,882
Share based compensation
Depreciation									1,310	1,197
Interest expense									55	97
Income tax (benefit) expense									468	265
Location profit (loss)									1,620	826
Capital expenditures									1,199	1,192
Location long-lived assets	7,894				8,965				7,894	8,965
Location assets	10,393				10,995				10,393	10,995
Malaysia (TMM) [Member]
Net Sales:
Customer sales									4,799	7,747
Intercompany sales									7,445	7,638
Total Net Sales									12,244	15,385
Share based compensation
Depreciation									1,155	1,024
Interest expense									265	215
Income tax (benefit) expense									(737)	(587)
Location profit (loss)									(2,188)	(1,347)
Capital expenditures									61	2,335
Location long-lived assets	5,368				9,029				5,368	9,029
Location assets	18,169				23,666				18,169	23,666
Inter-Company Eliminations [Member]
Net Sales:
Customer sales
Intercompany sales									(15,533)	(14,375)
Total Net Sales									(15,533)	(14,375)
Share based compensation
Depreciation
Interest expense
Income tax (benefit) expense									(38)	9
Location profit (loss)									55	37
Capital expenditures
Location long-lived assets
Location assets