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Discontinued Operations - 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
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Sep. 27, 2013 | Jun. 28, 2013 | Dec. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | May 31, 2013 Semiconductor Systems | Sep. 27, 2013 Semiconductor Systems | Jun. 28, 2013 Semiconductor Systems | Dec. 31, 2013 Semiconductor Systems | Dec. 31, 2012 Semiconductor Systems | Sep. 27, 2013 Semiconductor Systems Adjusted selling price | Oct. 31, 2012 Laser Products | Sep. 27, 2013 Laser Products | Dec. 31, 2012 Laser Products
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of assets and liabilities |  |  |  | $ 8,190,000 | $ 7,000,000 | $ 8,000,000 |  | $ 8,000,000 |  |  | $ 9,700,000 | $ 7,000,000 |  |
Gain (Loss) on sale of business | (281,000) | (311,000) | 2,255,000 | (592,000) | 2,255,000 |  | (300,000) | (300,000) | (400,000) |  |  |  | (200,000) | 2,300,000
Settlement of closing working capital adjustments |  |  |  |  |  |  | 1,700,000 |  |  |  |  |  | (400,000) |
Selling costs |  |  |  |  |  |  |  |  | 1,100,000 |  |  |  |  |
Inventory provision |  |  |  |  |  |  |  |  |  | $ 1,900,000 |  |  |  |

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