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Summary of Significant Accounting Policies - Additional Information (Detail) shares in Millions | 12 Months Ended
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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 |  |

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