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
6 Months Ended
Jun. 28, 2014
Jun. 29, 2013
Product Warranties Disclosures [Abstract]    
Warranty liabilities, beginning of period $ 297 $ 282
Adjustments to preexisting warranty liabilities (84) (79)
Additions to warranty liabilities 77 89
Reductions to warranty liabilities (35) (29)
Warranty liabilities, end of period $ 255 $ 263