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Nature of Operations and Summary of Significant Accounting Policies - Revenue Recognition by Product Type, Geography and Revenue Recognition Method (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 01, 2022	Jan. 02, 2021	Dec. 28, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 786,579	$ 635,028	$ 704,644
North America
Disaggregation of Revenue [Line Items]
Revenue	420,382	360,061	386,952
Europe
Disaggregation of Revenue [Line Items]
Revenue	220,578	161,527	180,888
Asia
Disaggregation of Revenue [Line Items]
Revenue	103,810	72,268	84,705
Rest of World
Disaggregation of Revenue [Line Items]
Revenue	41,809	41,172	52,099
Parts and Consumables
Disaggregation of Revenue [Line Items]
Revenue	511,766	417,545	440,699
Capital
Disaggregation of Revenue [Line Items]
Revenue	274,813	217,483	263,945
Point in Time
Disaggregation of Revenue [Line Items]
Revenue	705,709	557,702	611,528
Over Time
Disaggregation of Revenue [Line Items]
Revenue	$ 80,870	$ 77,326	$ 93,116

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