Commitments and Contingencies and Other Matters (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Reconciliation of short-term liability
Balance at the beginning of the period	$ 956		$ 2,279
Restructuring	2,693	1,034	(87)
Short-term/long-term reclassification		58	659
Cash payments	(1,774)	(850)	(2,137)
Balance at the end of the period	1,875	956
Long-term liability
Balance at the beginning of the period			765
Short-term/long-term reclassification		(58)	(659)
Balance at the end of the period	0
Personnel severance and related costs
Reconciliation of short-term liability
Restructuring	2,693	1,034
Lease-related and other credits
Reconciliation of short-term liability
Restructuring			(87)
Long-term liability
Restructuring charges			(48)
LED And Solar
Reconciliation of short-term liability
Balance at the beginning of the period			196
Restructuring	874	672
Cash payments	(960)	(138)	(196)
Balance at the end of the period	448
Long-term liability
Balance at the end of the period	0
LED And Solar \| Personnel severance and related costs
Reconciliation of short-term liability
Restructuring	874	672
Data Storage
Reconciliation of short-term liability
Balance at the beginning of the period			486
Restructuring	1,684	51	(87)
Short-term/long-term reclassification		58	123
Cash payments	(504)	(159)	(344)
Balance at the end of the period	1,308
Long-term liability
Balance at the beginning of the period			229
Short-term/long-term reclassification		(58)	(123)
Balance at the end of the period	0
Data Storage \| Personnel severance and related costs
Reconciliation of short-term liability
Restructuring	1,684	51
Data Storage \| Lease-related and other credits
Reconciliation of short-term liability
Restructuring			(87)
Long-term liability
Restructuring charges			(48)
Unallocated Corporate Amount
Reconciliation of short-term liability
Balance at the beginning of the period			1,597
Restructuring	135	311
Short-term/long-term reclassification			536
Cash payments	(310)	(553)	(1,597)
Balance at the end of the period	119
Long-term liability
Balance at the beginning of the period			536
Short-term/long-term reclassification			(536)
Balance at the end of the period	0
Unallocated Corporate Amount \| Personnel severance and related costs
Reconciliation of short-term liability
Restructuring	$ 135	$ 311

Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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Carrying amount as of the balance sheet date of known and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid after one year or beyond the next operating cycle, if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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- Definition

Amount of cash paid in the period to fully or partially settle a specified, previously accrued type of restructuring cost.

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