Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 item	Jun. 30, 2013	Dec. 31, 2013
Segment Information
Number of operating segments			5
Number of reportable segments			2
Reconciliation of Segment profit (loss) to Income (loss) from continuing operations before income tax
Net sales	$ 95,122	$ 97,435	$ 185,963	$ 159,216
Segment profit (Loss)	(6,980)	(2,244)	(9,704)	(17,902)
Interest income (expense), net	72	236	236	428
Amortization	(2,899)	(855)	(5,802)	(1,711)
Equity-based compensation	(5,091)	(3,713)	(9,813)	(6,292)
Restructuring	(801)		(1,193)	(531)	(1,485)
Changes in contingent consideration			29,368
Income (loss) before income taxes	(15,699)	(6,576)	3,092	(26,008)
Operating segment \| LED And Solar
Reconciliation of Segment profit (loss) to Income (loss) from continuing operations before income tax
Net sales	77,154	75,933	147,909	118,240
Segment profit (Loss)	(1,616)	3,124	508	(8,098)
Amortization	(2,576)	(532)	(5,155)	(1,064)
Equity-based compensation	(2,339)	(1,316)	(4,512)	(2,026)
Restructuring	(73)		(237)	(423)
Changes in contingent consideration			29,368
Income (loss) before income taxes	(6,604)	1,276	19,972	(11,611)
Operating segment \| Data Storage
Reconciliation of Segment profit (loss) to Income (loss) from continuing operations before income tax
Net sales	17,968	21,502	38,054	40,976
Segment profit (Loss)	(343)	(121)	(991)	254
Amortization	(323)	(323)	(647)	(647)
Equity-based compensation	(683)	(488)	(1,382)	(618)
Restructuring	(728)		(956)	(50)
Income (loss) before income taxes	(2,077)	(932)	(3,976)	(1,061)
Unallocated
Reconciliation of Segment profit (loss) to Income (loss) from continuing operations before income tax
Segment profit (Loss)	(5,021)	(5,247)	(9,221)	(10,058)
Interest income (expense), net	72	236	236	428
Equity-based compensation	(2,069)	(1,909)	(3,919)	(3,648)
Restructuring				(58)
Income (loss) before income taxes	$ (7,018)	$ (6,920)	$ (12,904)	$ (13,336)

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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