| 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 | Dec-31-15 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Net income | -147.5 | -79.1 | -81.0 | -32.4 | -47.3 | 12.8 | -6.2 | -12.8 |
| Depreciation and amortization | 30.7 | 47.7 | 45.0 | 34.3 | 16.8 | 9.5 | 5.1 | 3.9 |
| Asset impairment charges | 56.8 | | 5.0 | | | | | |
| Stock-based compensation | 36.8 | 38.5 | 32.6 | 27.3 | 10.4 | 8.8 | 4.3 | 0.6 |
| Deferred taxes | 0.0 | 0.5 | -5.3 | -16.4 | -3.6 | -9.5 | 0.5 | 0.3 |
| Change in working capital [+] | 25.7 | 4.4 | 1.3 | -8.5 | -9.6 | 3.0 | -0.4 | -0.7 |
| Accounts receivable | 5.5 | -1.5 | -2.4 | 1.4 | -9.5 | -1.8 | -0.8 | -1.7 |
| Inventories | -1.1 | -1.2 | -0.2 | -0.1 | -0.8 | 0.1 | -0.6 | -0.3 |
| Other current assets | -3.4 | -8.8 | 4.9 | -7.7 | -1.7 | 0.3 | -0.8 | -0.3 |
| Accounts payable | 8.7 | 2.0 | 2.1 | -7.8 | -0.8 | 1.3 | 0.7 | 0.4 |
| Other | 16.0 | 13.9 | -3.0 | 5.6 | 3.1 | 3.0 | 1.0 | 1.1 |
| Other operating activities | 4.9 | 3.5 | 7.2 | -10.0 | 49.2 | -6.3 | 3.5 | 12.0 |
| Cash from operations | 7.4 | 15.5 | 4.8 | -5.8 | 15.8 | 18.3 | 6.8 | 3.3 |
| |
| Capital expenditures [+] | -28.7 | -35.2 | -21.9 | -22.0 | -10.5 | -6.6 | -5.7 | -1.2 |
| Purchases of property and equipment | -2.3 | -3.4 | -3.1 | -7.5 | -5.0 | -3.3 | -3.8 | -0.2 |
| Capitalized product costs | -26.5 | -31.8 | -18.8 | -14.5 | -5.6 | -3.3 | -1.9 | -0.9 |
| Purchases of intangible assets | | | | -1.2 | 0.0 | | 0.0 | |
| Acquisitions | | | -6.8 | -158.8 | -32.2 | -34.5 | -5.4 | -2.4 |
| Other cash from investing | 120.0 | | | 1.0 | -1.0 | | | 0.3 |
| Cash from investing | 91.3 | -35.2 | -28.7 | -180.9 | -43.8 | -41.1 | -11.1 | -3.3 |
| |
| Issuance of common stock, net | | | | | -2.9 | 33.9 | 55.2 | |
| Option exercises | 0.1 | 4.1 | 3.9 | 3.7 | 3.5 | 0.5 | 0.2 | 0.0 |
| Financing costs | -0.4 | 0.0 | -1.2 | -9.6 | -0.2 | -0.2 | -1.5 | -0.1 |
| Other cash from financing | -32.2 | 11.0 | 8.6 | 202.4 | 48.8 | -4.8 | -50.1 | -2.1 |
| Cash from financing | -32.0 | 6.9 | 5.9 | 208.3 | 42.6 | 28.8 | 6.4 | -2.1 |
| |
| Free cash flow | 5.1 | 12.1 | 1.7 | -13.3 | 10.8 | 15.0 | 3.0 | 3.0 |
| Per share (diluted) | ($0.88) | ($0.85) | ($0.78) | ($1.35) | $0.28 | $0.62 | $0.10 | $0.48 |
| |
| Cash paid for interest | 7.2 | 8.7 | 5.8 | 3.2 | 0.7 | 0.6 | 8.5 | 2.4 |
| Cash paid for income taxes | 0.1 | 0.1 | 0.0 | 0.4 | | | | |