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Summary of Significant Accounting Policies - Additional Information (Detail)
shares in Millions
 12 Months Ended
Jan. 02, 2016
USD ($)
segment
shares
Jan. 03, 2015
USD ($)
shares
Dec. 28, 2013
USD ($)
shares
Summary Of Significant Accounting Policies [Line Items]      
Deferred Tax Reclass   $ 18,100,000  
Short-term investments $ 0 0  
Money market funds 20,100,000    
Accounts receivable, net of allowance for doubtful accounts 80,960,000 71,017,000  
Accumulated depreciation and amortization on property and equipment 11,800,000 9,100,000 $ 8,300,000
Accumulated amortization 16,336,000 13,015,000  
Cost of patents, Gross 5,400,000 6,400,000  
Cost of trademarks, Gross 900,000 800,000  
Capitalized Software Development Costs for Software Sold to Customers $ 500,000    
Product life estimate 7 years    
Capitalized Computer Software, Amortization $ 200,000 200,000 200,000
Unamortized cost by company 900,000 600,000  
Impairment of goodwill, intangible assets and other long-lived assets $ 0 0 0
Number of Sources of Product Revenue | segment 4    
Royalty Revenue, Number of Days Royalty Revenue is Adjusted Subsequent to Quarter End 60 days    
Advertising costs $ 10,700,000 10,700,000 9,600,000
Foreign currency transaction gain (loss) $ 500,000 $ 1,000,000 $ 4,000,000
Options to purchase of shares of common stock | shares 0.7 5.7 7.2
Number of reportable segments | segment 1    
Patents      
Summary Of Significant Accounting Policies [Line Items]      
Estimated life maximum 10 years    
Accumulated amortization $ 7,743,000 $ 6,649,000  
Total renewal costs capitalized $ 700,000    
Weighted average number of years until the next renewal 1 year    
Trademarks      
Summary Of Significant Accounting Policies [Line Items]      
Estimated life maximum 17 years    
Accumulated amortization $ 1,106,000 866,000  
Total renewal costs capitalized   600,000  
Weighted average number of years until the next renewal 5 years    
Patents and trademarks      
Summary Of Significant Accounting Policies [Line Items]      
Accumulated amortization $ 4,200,000 $ 3,700,000 $ 3,100,000
Minimum      
Summary Of Significant Accounting Policies [Line Items]      
Product life estimate 3 years    
Warranty period for defects in material and workmanship 6 months    
Maximum      
Summary Of Significant Accounting Policies [Line Items]      
Product life estimate 6 years    
Warranty period for defects in material and workmanship 16 months    
Restricted Stock Units (RSUs) [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Weighted Average Number of Shares, Contingently Issuable | shares 0.4