Segmental Information - Revenue and Assets by Geographic Region (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 30, 2025	Mar. 31, 2024
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 97.0	$ 89.4
Top five countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 81.6	$ 70.6
Top five countries \| Revenue from Contract with Customer Benchmark \| Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	84.20%	79.00%
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 61.8	$ 53.2
United States \| Revenue from Contract with Customer Benchmark \| Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	63.70%	59.60%
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 5.9	$ 5.4
Germany \| Revenue from Contract with Customer Benchmark \| Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	6.10%	6.00%
U.K.
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 5.7	$ 4.3
U.K. \| Revenue from Contract with Customer Benchmark \| Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	5.90%	4.80%
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 3.0	$ 4.0
Canada \| Revenue from Contract with Customer Benchmark \| Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	3.10%	4.50%
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 5.2	$ 3.7
Japan \| Revenue from Contract with Customer Benchmark \| Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	5.40%	4.10%
Rest of Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 9.9	$ 12.1
Rest of Europe \| Revenue from Contract with Customer Benchmark \| Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	10.20%	13.50%
Asia Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 3.9	$ 3.6
Asia Pacific \| Revenue from Contract with Customer Benchmark \| Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	4.00%	4.00%
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 1.6	$ 3.1
Other \| Revenue from Contract with Customer Benchmark \| Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	1.60%	3.50%