| In millions, except per share items | Dec-31-21 | Dec-31-20 | Mar-31-20 | Dec-31-19 | Mar-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 |
| | 10-K | 10-K | 8-K | 10-K | 8-K | 10-K | 10-K | S-1/A |
| Net income | -55.3 | -119.3 | -26.2 | -81.0 | -15.9 | -43.3 | -19.2 | 0.0 |
| Depreciation and amortization | 0.8 | 0.4 | | 0.2 | | 0.0 | | |
| Stock-based compensation | 19.3 | 16.1 | | 4.7 | | 2.0 | 0.6 | 0.3 |
| Change in working capital [+] | 12.2 | 28.0 | | 35.4 | | 14.8 | 7.1 | 0.5 |
| Accounts receivable | -7.7 | | | | | | | |
| Inventories | -5.5 | | | | | | | |
| Other current assets | 0.3 | -3.8 | | -1.2 | | -2.8 | -0.5 | |
| Accounts payable | 4.2 | 0.9 | | 2.6 | | 1.3 | 2.4 | 0.8 |
| Other | 21.0 | 31.0 | | 34.0 | | 16.4 | 5.2 | -0.3 |
| Other operating activities | -79.6 | -16.4 | | -32.7 | | -14.8 | -4.4 | -11.9 |
| Cash from operations | -102.6 | -91.2 | | -73.5 | | -41.2 | -15.9 | -11.2 |
| |
| Capital expenditures [+] | -0.7 | -0.2 | | -2.0 | | -0.2 | 0.0 | 0.0 |
| Purchases of property and equipment | -0.7 | -0.2 | | -2.0 | | -0.2 | | |
| Sales of property and equipment | 62.0 | | | | | | | |
| Purchases of intangible assets | -0.3 | | | | | | | |
| Other cash from investing | | -2.6 | | | | | | |
| Cash from investing | 61.0 | -2.8 | | -2.0 | | -0.2 | 0.0 | 0.0 |
| |
| Issuance of common stock, net | 107.7 | | | 134.7 | | 99.8 | 89.8 | 19.0 |
| Option exercises | 0.6 | 2.0 | | | | | | |
| Other cash from financing | 1.2 | 4.0 | | | | -1.0 | -0.3 | |
| Cash from financing | 108.3 | 2.0 | | 134.7 | | 98.8 | 89.6 | 19.0 |
| |
| Free cash flow | -103.2 | -91.4 | | -75.5 | | -41.5 | -15.9 | -11.2 |
| Per share (diluted) | ($2.39) | ($2.28) | | ($2.14) | | ($1.44) | ($0.82) | ($792.62) |