Annual report pursuant to Section 13 and 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
12 Months Ended
Jan. 03, 2015
Dec. 28, 2013
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]    
Warranty liabilities, beginning of period $ 296us-gaap_ProductWarrantyAccrual $ 282us-gaap_ProductWarrantyAccrual
Adjustments to preexisting warranty liabilities (123)us-gaap_ProductWarrantyAccrualPreexistingIncreaseDecrease (58)us-gaap_ProductWarrantyAccrualPreexistingIncreaseDecrease
Additions to warranty liabilities 119us-gaap_ProductWarrantyAccrualWarrantiesIssued 165us-gaap_ProductWarrantyAccrualWarrantiesIssued
Reductions to warranty liabilities (74)us-gaap_ProductWarrantyAccrualPayments (93)us-gaap_ProductWarrantyAccrualPayments
Warranty liabilities, end of period $ 218us-gaap_ProductWarrantyAccrual $ 296us-gaap_ProductWarrantyAccrual