Discontinued Operations (Details) (USD $)	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2011
Thernal Management Solutions [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from discontinued operations, net of income taxes			$ 0	$ 0	$ (100,000)
Net sales associated with the discontinued operations			0		100,000
Composite Material Division [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from discontinued operations, net of income taxes	0			100,000	(200,000)
Net sales associated with the discontinued operations	0	5,300,000	1,100,000	200,000	3,700,000	4,800,000
Discontinued operations, tax effect				$ 100,000	$ 100,000