| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | S-1/A |
| Net income | 20.2 | 37.4 | 18.6 | -17.6 | -1.5 | 9.1 | 2.9 |
| Depreciation and amortization [+] | 6.0 | 6.2 | 6.6 | 5.9 | 9.0 | 8.9 | 15.2 |
| Depreciation | 6.0 | 6.2 | 6.6 | 5.9 | 2.8 | 2.1 | 8.4 |
| Amortization of intangible assets | | | | | 6.2 | 6.8 | 6.7 |
| Deferred taxes | | | | | -1.9 | -1.9 | -0.1 |
| Change in working capital [+] | -7.7 | -14.1 | 11.1 | 7.8 | -15.8 | -5.4 | -1.2 |
| Accounts receivable | | | | | -7.4 | -10.7 | -1.2 |
| Inventories | | | | | -10.0 | 0.6 | -1.3 |
| Accounts payable | | | | | 4.3 | 4.7 | -3.4 |
| Accrued expenses | | | | | 1.5 | 3.4 | |
| Other | -7.7 | -14.1 | 11.1 | 7.8 | -4.2 | -3.4 | 4.7 |
| Other operating activities | -21.5 | 0.4 | 20.6 | 7.5 | -0.2 | 12.3 | -0.2 |
| Cash from operations | -3.1 | 30.0 | 56.9 | 3.6 | -10.4 | 23.0 | 16.5 |
| |
| Capital expenditures [+] | 9.2 | 10.2 | 5.1 | 3.9 | -7.5 | -5.9 | -1.9 |
| Purchases of property and equipment | 4.6 | 6.3 | 3.4 | 3.0 | -5.6 | -3.3 | -1.9 |
| Capitalized product costs | 4.7 | 3.9 | 1.7 | 0.9 | -1.9 | -2.6 | |
| Other cash from investing | -18.5 | -20.3 | -10.5 | -12.6 | | | -0.2 |
| Cash from investing | -9.2 | -10.2 | -5.4 | -8.6 | -7.5 | -5.9 | -2.0 |
| |
| Issuance of common stock, net | | | | 66.0 | | | |
| Option exercises | 2.2 | 4.8 | 1.6 | | | | |
| Financing costs | | 1.2 | | 0.3 | -0.4 | -2.8 | |
| Other cash from financing | 3.5 | -16.9 | -6.7 | -45.6 | 14.7 | -27.2 | -5.4 |
| Cash from financing | 1.2 | -23.0 | -8.4 | 20.0 | 15.1 | -24.3 | -5.4 |
| |
| Free cash flow | 1.5 | 36.2 | 60.3 | 6.6 | -16.0 | 19.7 | 14.7 |
| Per share (diluted) | $0.22 | $1.40 | $2.35 | $0.38 | ($1.32) | $1.26 | $148.41 |
| |
| Cash paid for interest | 0.8 | 2.1 | 4.0 | 6.5 | 7.6 | 1.5 | |
| Cash paid for income taxes | 1.3 | 0.8 | 2.2 | 1.7 | 1.1 | 1.5 | |