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Segmental Information - Financial Information by Reportable Segment (Details) - USD ($)
$ in Millions
 3 Months Ended
Apr. 02, 2023
Mar. 27, 2022
Dec. 31, 2022
Segment Reporting Information [Line Items]      
Net sales $ 101.3 $ 97.0  
Adjusted EBITDA 11.3 16.1  
Depreciation and amortization 3.3 3.7  
Restructuring charges 0.3 1.4  
Total assets 421.1   $ 407.1
Capital expenditures 1.9 1.0  
Discontinued operations      
Segment Reporting Information [Line Items]      
Total assets 6.6   8.1
Capital expenditures (0.1) 0.0  
Gas Cylinders      
Segment Reporting Information [Line Items]      
Net sales 41.5 42.4  
Elektron      
Segment Reporting Information [Line Items]      
Net sales 59.8 54.6  
Operating Segments | Gas Cylinders      
Segment Reporting Information [Line Items]      
Net sales 41.5 42.4  
Adjusted EBITDA 2.5 2.7  
Depreciation and amortization 1.1 1.4  
Restructuring charges 0.3 1.4  
Total assets 143.3   133.1
Capital expenditures 0.3 0.2  
Operating Segments | Elektron      
Segment Reporting Information [Line Items]      
Net sales 59.8 54.6  
Adjusted EBITDA 8.8 13.4  
Depreciation and amortization 2.2 2.3  
Restructuring charges 0.0 0.0  
Total assets 234.4   216.4
Capital expenditures 1.7 0.8  
Other      
Segment Reporting Information [Line Items]      
Total assets 36.8   $ 49.5
Capital expenditures $ 0.0 $ 0.0