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Income Taxes - Additional Information (Detail) (USD $)
3 Months Ended
Mar. 30, 2013
Income Taxes [Line Items]  
US R&D tax credit, amount $ 400,000
US R&D tax credit reduction in tax rate, percentage 1.30%
Minimum [Member]
 
Income Taxes [Line Items]  
Open tax years by major tax jurisdiction 2009
Maximum [Member]
 
Income Taxes [Line Items]  
Open tax years by major tax jurisdiction 2011