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Summary of Significant Accounting Policies - Additional Information (Detail) shares in Millions |  |  | 12 Months Ended
--- | --- | --- | ---
Nov. 05, 2016 USD ($) | Oct. 01, 2014 USD ($) | Dec. 31, 2016 USD ($) segment shares | Jan. 02, 2016 USD ($) shares | Jan. 03, 2015 USD ($) shares | Dec. 28, 2013 USD ($)
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Excess Tax Benefit from Share-based Compensation, Operating Activities |  |  | $ 13,000,000 | $ 3,000,000 | $ 400,000 |
Litigation Settlement, Amount |  | $ 466,800,000 |  |  |  |
Short-term investments |  |  | 0 | 0 |  |
Accounts receivable, net of allowance for doubtful accounts |  |  | 101,720,000 | 80,960,000 |  |
Accumulated depreciation and amortization on property and equipment |  |  | 13,000,000 | 11,800,000 | 9,200,000 |
Accumulated amortization |  |  | 21,313,000 | 16,336,000 |  |
Cost of patents, Gross |  |  | 5,000,000 | 5,400,000 |  |
Cost of trademarks, Gross |  |  | 600,000 | 900,000 |  |
Capitalized Software Development Costs for Software Sold to Customers |  |  | $ 0 | 500,000 | 500,000 |
Product life estimate |  |  | 7 years |  |  |
Capitalized Computer Software, Amortization |  |  | $ 100,000 | 200,000 | 200,000 |
Unamortized cost by company |  |  | 800,000 | 900,000 |  |
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 |  |  |  | 11,000,000 | 10,700,000 | $ 10,700,000
Foreign currency transaction gain (loss) |  |  | $ 100,000 | $ 500,000 | $ 1,000,000 |
Options to purchase of shares of common stock | shares |  |  | 0.2 | 0.7 | 5.7 |
Number of reportable segments | segment |  |  | 1 |  |  |
Patents |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Estimated life maximum |  |  | 10 years |  |  |
Accumulated amortization |  |  | $ 7,427,000 | $ 7,743,000 |  |
Total renewal costs capitalized |  |  | $ 600,000 | 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 |  |  | $ 1,331,000 | 1,106,000 |  |
Total renewal costs capitalized |  |  |  | 600,000 |  |
Weighted average number of years until the next renewal |  |  | 6 years |  |  |
Patents and trademarks |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Accumulated amortization |  |  | $ 3,800,000 | $ 4,200,000 | $ 3,400,000 |
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 |  |  | 48 months |  |  |
Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Weighted Average Number of Shares, Contingently Issuable | shares |  |  | 2.7 |  |  |
Masimo vs Philips N.V. [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Litigation Settlement, Amount | $ 300,000,000 |  |  |  |  |
Collaborative Arrangement, Rights and Obligations |  |  | 30 |  |  |

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