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Commitments, Contingencies and Other Matters (Details 2) (USD $)
In Thousands, unless otherwise specified
6 Months Ended 12 Months Ended
Jun. 30, 2013
Dec. 31, 2012
Reconciliation of short-term liability    
Balance at the beginning of the period $ 1,875 $ 956
Restructuring 531 2,693
Cash payments (1,897) (1,774)
Balance at the end of the period 509 1,875
LED And Solar
   
Reconciliation of short-term liability    
Balance at the beginning of the period 448 534
Restructuring 422 874
Cash payments (805) (960)
Balance at the end of the period 65 448
Data Storage
   
Reconciliation of short-term liability    
Balance at the beginning of the period 1,308 128
Restructuring 51 1,684
Cash payments (926) (504)
Balance at the end of the period 433 1,308
Unallocated Corporate
   
Reconciliation of short-term liability    
Balance at the beginning of the period 119 294
Restructuring 58 135
Cash payments (166) (310)
Balance at the end of the period $ 11 $ 119