Note 4 - Restructuring - Schedule of Restructuring and Related Costs (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 28, 2026 |
Jun. 29, 2025 |
Jun. 28, 2026 |
Jun. 29, 2025 |
|
| Severance and other costs | $ 1.5 | $ 0.3 | $ 3.7 | $ 0.1 |
| Restructuring and Related Cost, Accelerated Depreciation | 0.0 | 1.7 | 0.0 | 1.7 |
| Asset impairment charges | 0.1 | 0.0 | 0.1 | 0.0 |
| Total restructuring charges | 1.6 | 2.0 | 3.8 | 1.8 |
| Gas Cylinders Segment [Member] | ||||
| Severance and other costs | 1.3 | 0.3 | 3.5 | 0.4 |
| Restructuring and Related Cost, Accelerated Depreciation | 0.0 | 1.7 | 0.0 | 1.7 |
| Asset impairment charges | 0.1 | 0.0 | 0.1 | 0.0 |
| Total restructuring charges | 1.4 | 3.6 | ||
| Elektron Segment [Member] | ||||
| Severance and other costs | 0.1 | 0.0 | 0.2 | 0.0 |
| Total restructuring charges | 0.1 | 0.2 | ||
| Superform Segment [Member] | ||||
| Severance and other costs | 0.1 | $ 0.0 | $ 0.0 | $ (0.3) |
| Total restructuring charges | $ 0.1 | |||