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Accrued Liabilities (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 29, 2012
Dec. 31, 2011
Schedule of Accrued Liabilities [Line Items]    
Accrued compensation and benefits $ 9,135 $ 10,665
Accrued warranties 2,246 2,365
Professional and legal fees 1,221 966
Other accrued liabilities 3,640 4,080
Accrued liabilities $ 16,242 $ 18,076