| In millions, except per share items | Dec-31-22 | Dec-05-22 | Dec-31-21 | Dec-05-21 | Dec-31-20 | Dec-31-19 |
| | 10-K | 8-K | 10-K | 8-K | 10-K | 10-K |
| Net income | -67.3 | -67.3 | -13.7 | -13.7 | 2.7 | 3.1 |
| Depreciation and amortization | 13.7 | 13.7 | 9.0 | 9.0 | 6.4 | 4.2 |
| Asset impairment charges | 0.5 | 0.5 | 2.8 | 2.8 | 7.5 | 1.7 |
| Stock-based compensation | 10.4 | 10.4 | 4.9 | 4.9 | 1.8 | 1.8 |
| Deferred taxes | -0.5 | -0.5 | 0.2 | 0.2 | 1.3 | -1.1 |
| Change in working capital [+] | -32.5 | -27.1 | -12.3 | -6.3 | -14.6 | -6.7 |
| Accounts receivable | -12.0 | -12.0 | -6.5 | -6.5 | 0.4 | -5.2 |
| Inventories | -21.5 | -21.5 | -11.1 | -11.1 | -14.8 | -3.6 |
| Other current assets | -3.0 | 0.5 | -2.5 | 0.0 | 0.9 | -0.6 |
| Accounts payable | | 1.9 | | 3.4 | | |
| Accrued expenses | 2.3 | 2.3 | 7.1 | 7.1 | -0.8 | 3.1 |
| Income taxes | 0.4 | 0.4 | 0.7 | 0.7 | -0.2 | -0.4 |
| Other | 1.4 | 1.4 | | | | |
| Other operating activities | 26.5 | 21.2 | 5.7 | -0.2 | -4.0 | 9.3 |
| Cash from operations | -49.2 | -49.2 | -3.3 | -3.3 | 1.1 | 12.3 |
| |
| Capital expenditures [+] | -22.8 | -22.8 | -18.3 | -18.3 | -9.7 | -17.3 |
| Purchases of property and equipment | -22.8 | -22.8 | -18.3 | -18.3 | -9.7 | -17.3 |
| Sales of property and equipment | 0.9 | 0.9 | 0.8 | 0.8 | 0.5 | 0.6 |
| Purchases of intangible assets | -2.0 | -2.0 | -3.0 | -3.0 | -1.2 | -0.8 |
| Acquisitions | -18.5 | -18.5 | -15.0 | -15.0 | | |
| Other cash from investing | -18.3 | -18.3 | | | | |
| Cash from investing | -60.7 | -60.7 | -35.5 | -35.5 | -10.3 | -17.5 |
| |
| Issuance of common stock, net | | | 129.8 | 1.0 | 0.3 | -3.9 |
| Option exercises | 5.3 | 5.8 | 0.4 | 0.4 | 1.8 | 0.1 |
| Financing costs | -0.7 | -0.7 | -3.1 | -3.1 | -0.1 | -0.2 |
| Other cash from financing | 44.0 | 44.5 | -1.4 | 127.4 | 25.4 | 10.4 |
| Cash from financing | 39.5 | 39.5 | 131.1 | 131.1 | 24.0 | 6.5 |
| |
| Free cash flow | -72.0 | -72.0 | -21.6 | -21.6 | -8.5 | -5.0 |
| Per share (diluted) | ($0.94) | | ($0.41) | | ($0.14) | ($0.08) |
| |
| Cash paid for interest | 3.1 | 3.1 | 1.1 | 1.1 | 0.4 | 0.6 |
| Cash paid for income taxes | 1.1 | 1.1 | 0.7 | 0.7 | 0.5 | 0.1 |