Summary of Significant Accounting Policies - Textual (Details)	12 Months Ended
	Dec. 26, 2020 USD ($) Segment	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Property plant and equipment method	straight-line method
Impairment of long-lived assets	$ 0		$ 0
Number of operating segments | Segment	1
Goodwill impairment	$ 0	$ 0	0
Accumulated exchange losses resulting from translation of foreign operation	4,479,000	564,000
Derivative instruments, (loss) gain recognized in income, net	510,000	343,000	(81,000)
Aggregate notional amounts	37,580,000	38,887,000
Forward Contracts Matured [Member]
Summary Of Significant Accounting Policies [Line Items]
Aggregate notional amounts	373,749,000	58,522,000	8,465,000
IPR&D [Member]
Summary Of Significant Accounting Policies [Line Items]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	$ 0	0	$ 0
General and Administrative Expense [Member]
Summary Of Significant Accounting Policies [Line Items]
Impairment of long-lived assets		$ 507,000
Computer Equipment [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of depreciable assets	3 years
Minimum [Member] | Building [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of depreciable assets	5 years
Minimum [Member] | Machinery and equipment [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of depreciable assets	3 years
Minimum [Member] | Furniture and fixtures [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of depreciable assets	3 years
Minimum [Member] | Software [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of depreciable assets	3 years
Maximum [Member] | Building [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of depreciable assets	22 years
Maximum [Member] | Machinery and equipment [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of depreciable assets	10 years
Maximum [Member] | Furniture and fixtures [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of depreciable assets	10 years
Maximum [Member] | Software [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of depreciable assets	7 years
Systems Revenue [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Assurance warranty period against defects	12 months
Systems Revenue [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Assurance warranty period against defects	14 months