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Summary of Significant Accounting Policies - Additional Information (Detail) $ in Thousands, shares in Millions | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 30, 2019 USD ($) | Dec. 28, 2019 USD ($) segment shares | Dec. 29, 2018 USD ($) shares | Dec. 30, 2017 USD ($) shares | Dec. 30, 2018 USD ($)
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Short-term investments |  | $ 120,000 | $ 0 |  |
Number of Sources of Product Revenue | segment |  | 4 |  |  |
Royalty Revenue, Number of Days Royalty Revenue is Adjusted Subsequent to Quarter End |  | 60 days |  |  |
Royalty |  | $ 700 | 26,400 | $ 32,800 |
Advertising costs |  | $ 14,000 | $ 17,900 | $ 17,800 |
Options to purchase of shares of common stock | shares |  | 0.4 | 1.1 | 0.4 |
Number of reportable segments | segment |  | 1 |  |  |
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability |  |  |  |  | $ 22,500
Cumulative Effect on Retained Earnings, Net of Tax, Lease Receivable |  |  |  |  | 62,000
Cumulative Effect on Retained Earnings, Net of Tax, Leased Equipment |  |  |  |  | 103,500
Cumulative Effect on Retained Earnings, Net of Tax, Deferred Tax Assets |  |  |  |  | 8,600
Cumulative Effect on Retained Earnings, Net of Tax, Deferred Tax Deferred Revenue and Contract-Related Liabilities |  |  |  |  | 9,100
Cumulative Effect on Retained Earnings, Net of Tax, Other Current Liabilities |  |  |  |  | $ 3,000
Minimum |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Maturity of Time Deposits |  | 2 months |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period |  | 3 years |  |  |
Warranty period for defects in material and workmanship |  | 6 months |  |  |
Maximum |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Maturity of Time Deposits |  | 10 months |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period |  |  | 6 years |  |
Warranty period for defects in material and workmanship |  | 48 months |  |  |
Restricted Stock Units (RSUs) |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Weighted Average Number of Shares, Contingently Issuable | shares |  | 2.7 | 2.7 | 2.7 |
Aircraft and components | Minimum |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Property and equipment, useful life |  | 4 years |  |  |
Aircraft and components | Maximum |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Property and equipment, useful life |  | 20 years |  |  |
Building |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Property and equipment, useful life |  | 39 years |  |  |
Buildings improvements | Minimum |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Property and equipment, useful life |  | 7 years |  |  |
Buildings improvements | Maximum |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Property and equipment, useful life |  | 15 years |  |  |
Computer equipment | Minimum |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Property and equipment, useful life |  | 2 years |  |  |
Computer equipment | Maximum |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Property and equipment, useful life |  | 6 years |  |  |
Demonstration units |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Property and equipment, useful life |  | 3 years |  |  |
Furniture and Office Equipment | Minimum |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Property and equipment, useful life |  | 2 years |  |  |
Furniture and Office Equipment | Maximum |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Property and equipment, useful life |  | 6 years |  |  |
Machinery and equipment | Minimum |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Property and equipment, useful life |  | 5 years |  |  |
Machinery and equipment | Maximum |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Property and equipment, useful life |  | 10 years |  |  |
Tooling |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Property and equipment, useful life |  | 3 years |  |  |
Vehicles |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Property and equipment, useful life |  | 5 years |  |  |
Retained Earnings | Accounting Standards Update 2016-02 |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Cumulative Effect on Retained Earnings, Tax | $ 26,800 |  |  |  |
Patents |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Estimated life maximum |  | 10 years |  |  |
Trademarks |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Estimated life maximum |  | 17 years |  |  |

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