Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies and Nature of Operations - Aggregate Warranty Liabilities (Detail)

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Summary of Significant Accounting Policies and Nature of Operations - Aggregate Warranty Liabilities (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 29, 2014
Mar. 30, 2013
Product Warranties Disclosures [Abstract]    
Warranty liabilities, beginning of period $ 297 $ 282
Adjustments to preexisting warranty liabilities      
Additions to warranty liabilities 38 50
Reductions to warranty liabilities (23) (14)
Warranty liabilities, end of period $ 312 $ 318