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Property and Equipment - Components of Property and Equipment (Detail) - USD ($) $ in Thousands | Dec. 29, 2018 | Dec. 30, 2017
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Property, Plant and Equipment [Line Items] |  |
Total property and equipment | $ 263,762 | $ 246,333
Accumulated depreciation and amortization | (97,790) | (82,237)
Total property and equipment, net | 165,972 | 164,096
Construction in Progress, Gross |  | 6,365
Building and building improvements |  |
Property, Plant and Equipment [Line Items] |  |
Total property and equipment | 88,449 | 87,999
Machinery and equipment |  |
Property, Plant and Equipment [Line Items] |  |
Total property and equipment | 54,525 | 47,556
Aircraft and vehicles |  |
Property, Plant and Equipment [Line Items] |  |
Total property and equipment | 25,555 | 25,329
Land |  |
Property, Plant and Equipment [Line Items] |  |
Total property and equipment | 23,762 | 23,762
Computer equipment |  |
Property, Plant and Equipment [Line Items] |  |
Total property and equipment | 16,582 | 15,789
Leasehold improvements |  |
Property, Plant and Equipment [Line Items] |  |
Total property and equipment | 16,428 | 15,326
Tooling |  |
Property, Plant and Equipment [Line Items] |  |
Total property and equipment | 14,212 | 13,754
Furniture and office equipment |  |
Property, Plant and Equipment [Line Items] |  |
Total property and equipment | 10,459 | 9,967
Demonstration units |  |
Property, Plant and Equipment [Line Items] |  |
Total property and equipment | 470 | $ 486
Construction-in-progress (CIP) |  |
Property, Plant and Equipment [Line Items] |  |
Total property and equipment | $ 13,320 |

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