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Segmental Information - Geographic Information by Region (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 26, 2022
Jun. 27, 2021
Jun. 26, 2022
Jun. 27, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net sales $ 109.5 $ 99.0 $ 206.5 $ 184.2
Top five countries        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net sales $ 79.1 $ 71.6 $ 150.1 $ 134.2
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 72.20% 72.30% 72.70% 72.90%
United States        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net sales $ 61.7 $ 55.7 $ 117.0 $ 102.4
United States | Revenue from Contract with Customer Benchmark | Geographic Concentration Risk        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Concentration risk, percentage 56.30% 56.30% 56.70% 55.60%
U.K.        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net sales $ 6.0 $ 5.7 $ 11.4 $ 11.0
U.K. | Revenue from Contract with Customer Benchmark | Geographic Concentration Risk        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Concentration risk, percentage 5.50% 5.80% 5.50% 6.00%
Germany        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net sales $ 6.4 $ 4.4 $ 10.9 $ 8.1
Germany | Revenue from Contract with Customer Benchmark | Geographic Concentration Risk        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Concentration risk, percentage 5.80% 4.40% 5.30% 4.40%
France        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net sales $ 2.6 $ 3.4 $ 4.9 $ 6.7
France | Revenue from Contract with Customer Benchmark | Geographic Concentration Risk        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Concentration risk, percentage 2.40% 3.40% 2.40% 3.60%
Italy        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net sales $ 2.4 $ 2.4 $ 5.9 $ 6.0
Italy | Revenue from Contract with Customer Benchmark | Geographic Concentration Risk        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Concentration risk, percentage 2.20% 2.40% 2.80% 3.30%
Rest of Europe        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net sales $ 6.4 $ 7.0 $ 12.4 $ 14.1
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 5.80% 7.10% 6.00% 7.70%
Asia Pacific        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net sales $ 17.8 $ 13.4 $ 32.4 $ 24.4
Asia Pacific | Revenue from Contract with Customer Benchmark | Geographic Concentration Risk        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Concentration risk, percentage 16.30% 13.50% 15.70% 13.20%
Other        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net sales $ 6.2 $ 7.0 $ 11.6 $ 11.5
Other | Revenue from Contract with Customer Benchmark | Geographic Concentration Risk        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Concentration risk, percentage 5.70% 7.10% 5.60% 6.20%