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Selected Consolidated Financial Data - Additional Information (Detail) (USD $)
 3 Months Ended 12 Months Ended 1 Months Ended 3 Months Ended 12 Months Ended 1 Months Ended 3 Months Ended 12 Months Ended
Sep. 27, 2013
Jun. 28, 2013
Dec. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Oct. 31, 2012
Laser Products
Sep. 27, 2013
Laser Products
Dec. 31, 2012
Laser Products
May 31, 2013
Semiconductor Systems
Sep. 27, 2013
Semiconductor Systems
Jun. 28, 2013
Semiconductor Systems
Dec. 31, 2013
Semiconductor Systems
Effect of Fourth Quarter Events [Line Items]                        
Proceeds from sale of net assets and liabilities       $ 8,190,000 $ 7,000,000 $ 7,000,000     $ 8,000,000   $ 8,000,000  
Gain (Loss) on sale of business (281,000) (311,000) 2,255,000 (592,000) 2,255,000   (200,000) 2,300,000   (300,000) (300,000) (400,000)
Tax benefit recognized due to the release of a portion of the valuation allowance on deferred tax assets     $ 15,300,000   $ 15,300,000