| In millions, except per share items | Dec-31-22 | Dec-25-21 | Dec-26-20 | Dec-28-19 | Dec-29-18 | Dec-30-17 | Dec-31-16 | Dec-26-15 |
| | 8-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Net income | -35.1 | 1.6 | -9.2 | 15.3 | -21.4 | -9.6 | -5.3 | -2.4 |
| Depreciation and amortization | | 8.5 | 9.6 | 11.4 | 12.7 | 12.9 | 13.5 | 14.1 |
| Asset impairment charges | | | | | 6.7 | | | |
| Stock-based compensation | | 0.5 | 0.4 | 0.5 | 0.0 | 0.9 | 1.3 | 1.4 |
| Tax benefit from stock-based compensation | | | | | | | 0.0 | -0.3 |
| Deferred taxes | | -0.1 | -0.3 | -0.5 | -0.5 | 8.2 | -3.3 | -0.7 |
| Change in working capital [+] | | -18.2 | 6.5 | 6.8 | 7.5 | -21.8 | 17.3 | -2.9 |
| Accounts receivable | | -7.8 | -4.7 | 5.2 | 3.8 | -2.9 | 7.2 | -0.3 |
| Inventories | | -14.8 | 8.0 | 9.7 | 8.5 | -16.4 | 17.9 | -10.9 |
| Other current assets | | -1.9 | -2.2 | -1.0 | -0.5 | 0.8 | -1.0 | 0.8 |
| Other | | 6.5 | 5.4 | -7.1 | -4.2 | -3.2 | -6.7 | 7.6 |
| Other operating activities | | 1.0 | 0.6 | -21.8 | 0.2 | -0.4 | 0.3 | -0.5 |
| Cash from operations | | -6.6 | 7.5 | 11.7 | 5.1 | -9.6 | 23.9 | 8.6 |
| |
| Capital expenditures [+] | | -4.4 | -1.4 | -4.2 | -4.1 | -12.7 | -4.9 | -6.8 |
| Purchases of property and equipment | | -4.4 | -1.4 | -4.2 | -4.1 | -12.7 | -4.9 | -6.8 |
| Sales of property and equipment | | 19.5 | 0.0 | 37.2 | 1.9 | | 0.0 | 0.1 |
| Cash from investing | | 15.1 | -1.3 | 33.0 | -2.2 | -12.7 | -4.9 | -6.8 |
| |
| Repurchase of common stock, net | | -0.1 | -0.9 | -0.8 | -0.1 | -0.1 | -0.2 | -0.6 |
| Option exercises | | | | | | | | 0.3 |
| Financing costs | | | -1.7 | -0.3 | | | -0.3 | |
| Other cash from financing | | -0.2 | -11.5 | -43.4 | -2.9 | 22.3 | -19.3 | -1.1 |
| Cash from financing | | -0.3 | -10.7 | -43.9 | -2.9 | 22.2 | -19.2 | -2.0 |
| |
| Free cash flow | | -11.0 | 6.1 | 7.5 | 1.1 | -22.3 | 19.0 | 1.8 |
| Per share (diluted) | | ($0.72) | $0.40 | $0.47 | $0.07 | ($1.42) | $1.22 | $0.11 |
| |
| Cash paid for interest | | 3.1 | 3.6 | | | | | |
| Cash paid for income taxes | | 1.0 | -0.1 | 0.1 | 0.0 | 0.0 | -0.2 | 0.0 |