Nature of Operations and Summary of Significant Accounting Policies - Revenue Recognition Method and Disaggregation of Revenue by Product Type and Geography (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Oct. 01, 2022	Sep. 30, 2023	Oct. 01, 2022
Disaggregation of Revenue [Line Items]
Revenue	$ 244,182	$ 224,510	$ 718,993	$ 672,639
North America
Disaggregation of Revenue [Line Items]
Revenue	133,780	126,699	401,618	375,115
Europe
Disaggregation of Revenue [Line Items]
Revenue	66,491	57,409	181,273	174,264
Asia
Disaggregation of Revenue [Line Items]
Revenue	27,393	26,953	88,030	87,916
Rest of world
Disaggregation of Revenue [Line Items]
Revenue	16,518	13,449	48,072	35,344
Parts and consumables
Disaggregation of Revenue [Line Items]
Revenue	149,564	141,857	454,209	433,781
Capital
Disaggregation of Revenue [Line Items]
Revenue	94,618	82,653	264,784	238,858
Point in Time
Disaggregation of Revenue [Line Items]
Revenue	216,956	201,557	643,430	603,117
Over Time
Disaggregation of Revenue [Line Items]
Revenue	$ 27,226	$ 22,953	$ 75,563	$ 69,522