Discountinued Operations and Assets Held For Sale - Reconciliation of Major Classes of Assets Incluted Held for Sale Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Discountinued Operations And Assets Held For Sale - Reconciliation Of Major Classes Of Assets Incluted Held For Sale Operations Details
Net sales	$ 8,380	$ 7,757
Cost of sales	5,570	5,758
Gross profit	2,810	1,999
Selling, general and administrative	1,806	1,575
Engineering and product development	283	316
Total operating expenses of discontinued operations	2,089	1,891
Income from discontinued operations	721	108
Interest expense	(62)	(77)
Other, net	172	(9)
Total other expense, net	110	(86)
Income before income taxes on discontinued operations	518	(5)
Income tax expense	313	27
Net profit/(loss) on discontinued operations, presented in the statement of comprehensive loss	$ 518	$ (5)