| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 |
| | 10-K | 10-K | 10-K | 10-K/A | S-1/A |
| Net income | -740.3 | -240.3 | -34.0 | -103.6 | -121.3 |
| Depreciation and amortization | 50.8 | 24.9 | 8.6 | 8.1 | 4.2 |
| Asset impairment charges | 498.8 | | | 0.4 | |
| Stock-based compensation | 48.0 | 28.8 | 8.0 | 5.2 | 3.0 |
| Change in working capital [+] | -42.3 | -63.1 | -8.0 | -5.5 | 3.2 |
| Accounts receivable | 6.7 | -18.3 | -2.4 | -1.7 | -3.1 |
| Inventories | -28.2 | -17.0 | -1.3 | -1.7 | -7.0 |
| Other current assets | 1.8 | -8.9 | 0.9 | 0.8 | 0.7 |
| Accounts payable | -6.6 | 12.8 | -2.6 | -4.5 | 9.1 |
| Deferred revenues | -4.7 | 6.0 | 0.8 | -1.7 | 3.9 |
| Other | -11.3 | -37.6 | -3.3 | 3.2 | -0.4 |
| Other operating activities | 3.6 | 94.7 | -55.2 | -1.9 | -0.1 |
| Cash from operations | -181.5 | -155.0 | -80.6 | -97.2 | -111.0 |
| |
| Capital expenditures [+] | -11.5 | -7.7 | -1.4 | -7.2 | -14.8 |
| Purchases of property and equipment | -11.5 | -7.7 | -1.4 | -6.9 | -14.0 |
| Capitalized product costs | | | | -0.3 | -0.8 |
| Sales of property and equipment | 0.0 | 0.0 | | | 0.0 |
| Acquisitions | 0.0 | -287.6 | -5.3 | -0.1 | |
| Sales of short-term investments, net [+] | 89.7 | -87.5 | -27.3 | -18.7 | 54.2 |
| Purchases of short-term investments | -158.4 | -330.9 | -136.3 | -215.6 | -96.8 |
| Sales of short-term investments | 248.2 | 243.3 | 109.0 | 196.8 | 151.0 |
| Other cash from investing | 3.4 | -44.5 | -3.0 | | -0.5 |
| Cash from investing | 81.6 | -427.3 | -37.0 | -26.0 | 39.0 |
| |
| Issuance of common stock, net | 50.0 | | | | |
| Option exercises | 3.2 | 6.4 | 0.3 | 0.7 | 0.4 |
| Other cash from financing | 67.0 | 173.0 | 535.2 | 161.1 | 45.8 |
| Cash from financing | 113.8 | 166.6 | 534.9 | 160.4 | 45.4 |
| |
| Free cash flow | -193.0 | -162.7 | -82.0 | -104.1 | -125.0 |
| Per share (diluted) | ($0.61) | ($0.62) | ($0.52) | ($0.70) | ($7.63) |
| |
| Cash paid for interest | 3.5 | 0.1 | 0.3 | 0.5 | 0.3 |
| Cash paid for income taxes | | 0.2 | | | |