Discontinued Operations and Assets Held for Sale Discontinued Business Unit Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss from discontinued operations before sale of business unit	$ (250)	$ (697)	$ (680)	$ (1,895)
Income (loss) from discontinued operations, net of tax	(250)	(697)	2,761	(1,895)
Semiconductor Business Unit [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales and revenues		763		2,268
Gross margin		(401)		(995)
Loss from discontinued operations before sale of business unit		(697)		(1,895)
Gain on sale of business unit, net of transaction expenses		0		0
Income tax provision		0		0
Income (loss) from discontinued operations, net of tax		(697)		(1,895)
Medical Products Business Unit [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales and revenues	0
Gross margin	0
Loss from discontinued operations before sale of business unit	(250)
Gain on sale of business unit, net of transaction expenses	0
Income tax provision	0
Income (loss) from discontinued operations, net of tax	(250)
Medical Products and Semiconductor Business Unit [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales and revenues			425
Gross margin			(296)
Loss from discontinued operations before sale of business unit			(680)
Gain on sale of business unit, net of transaction expenses			5,449
Income tax provision			(2,008)
Income (loss) from discontinued operations, net of tax			$ 2,761