Commitments and Contingencies and Other Matters (Details) (USD $)	3 Months Ended		12 Months Ended					12 Months Ended	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Data Storage product line	Dec. 31, 2011 LED and Solar product line	Dec. 31, 2010 Data Storage facilities	Dec. 31, 2011 Personnel severance and related costs	Dec. 31, 2012 Personnel severance and related costs Employee	Dec. 31, 2011 Personnel severance and related costs Employee	Dec. 31, 2012 Equity compensation and related costs	Dec. 31, 2012 Lease-related and other severance costs (credits)	Dec. 31, 2010 Lease-related and other severance costs (credits)	Dec. 31, 2012 Other associated costs Employee
Restructuring and other charges
Restructuring charges	$ 1,800,000	$ 2,000,000	$ 3,813,000	$ 1,288,000	$ (179,000)			$ (200,000)	$ 1,300,000	$ 3,040,000	$ 1,288,000	$ 414,000	$ 359,000	$ (179,000)
Inventory write-offs						1,000,000	800,000
Other associated costs															400,000
Number of employees impacted										52	65				52
Personnel severance charges										3,000,000	1,300,000
Asset impairment			$ 1,335,000	$ 584,000