Note 4 - Restructuring - Schedule of Restructuring and Related Costs (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 27, 2026 |
Sep. 28, 2025 |
Sep. 27, 2026 |
Sep. 28, 2025 |
|
| Severance and other costs | $ 0.7 | $ 1.1 | $ 4.4 | $ 1.2 |
| Restructuring and Related Cost, Accelerated Depreciation | 0.0 | 2.1 | 0.0 | 3.8 |
| Asset impairment charges | 0.0 | 0.2 | 0.1 | 0.2 |
| Total restructuring charges | 0.7 | 3.4 | 4.5 | 5.2 |
| Gas Cylinders Segment [Member] | ||||
| Severance and other costs | 0.3 | 0.7 | 3.8 | 1.1 |
| Restructuring and Related Cost, Accelerated Depreciation | 0.0 | 0.0 | 0.0 | 1.7 |
| Asset impairment charges | 0.0 | 0.2 | 0.1 | 0.2 |
| Total restructuring charges | 0.3 | 3.9 | ||
| Elektron Segment [Member] | ||||
| Severance and other costs | 0.4 | 0.5 | 0.6 | 0.5 |
| Restructuring and Related Cost, Accelerated Depreciation | 0.0 | 2.1 | 2.1 | |
| Total restructuring charges | 0.4 | 0.6 | ||
| Superform Segment [Member] | ||||
| Severance and other costs | $ 0.0 | $ (0.1) | $ 0.0 | $ (0.4) |