Segment Information (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
Net Sales:
Customer sales									$ 37,059	$ 46,730
Intercompany sales
Total Net Sales	$ 7,993	$ 8,988	$ 9,963	$ 10,115	$ 9,889	$ 11,317	$ 12,392	$ 13,132	$ 37,059	$ 46,730
Share based compensation									133	128
Depreciation									2,863	3,445
Interest expense									208	354
Income tax (benefit) expense	$ 442	$ 22	$ (73)	$ (81)	$ (474)	$ 61	$ 34	$ 192	310	(187)
Location profit (loss)									(6,364)	(554)
Capital expenditures									5,662	2,064
Location long-lived assets									17,472	18,889
Location assets									36,708	48,126
United States (Corpus Christi) [Member]
Net Sales:
Customer sales									25,646	31,777
Intercompany sales									37	111
Total Net Sales									25,683	31,888
Share based compensation									133	128
Depreciation									1,011	980
Interest expense									13	34
Income tax (benefit) expense									(318)	120
Location profit (loss)									(760)	(41)
Capital expenditures									1,335	804
Location long-lived assets									5,904	5,627
Location assets									15,982	19,564
European (TPT) [Member]
Net Sales:
Customer sales									8,619	10,154
Intercompany sales									4,309	7,977
Total Net Sales									$ 12,928	$ 18,131
Share based compensation
Depreciation									$ 1,174	$ 1,310
Interest expense									25	55
Income tax (benefit) expense									(69)	468
Location profit (loss)									(225)	1,620
Capital expenditures									4,676	1,199
Location long-lived assets									10,618	7,894
Location assets									13,190	10,393
Asian (TMM) [Member]
Net Sales:
Customer sales									2,794	4,799
Intercompany sales									5,832	7,445
Total Net Sales									$ 8,626	$ 12,244
Share based compensation
Depreciation									$ 678	$ 1,155
Interest expense									170	265
Income tax (benefit) expense									681	(737)
Location profit (loss)									(5,437)	(2,188)
Capital expenditures									6	61
Location long-lived assets									950	5,368
Location assets									$ 7,536	$ 18,169
Inter-Company Eliminations [Member]
Net Sales:
Customer sales
Intercompany sales									$ (10,178)	$ (15,533)
Total Net Sales									$ (10,178)	$ (15,533)
Share based compensation
Depreciation
Interest expense
Income tax (benefit) expense									$ 16	$ (38)
Location profit (loss)									$ 58	$ 55
Capital expenditures
Location long-lived assets
Location assets