| In millions, except per share items | Dec-31-22 | Dec-05-22 | Dec-31-21 | Dec-05-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 |
| | 10-K | 8-K | 10-K | 8-K | 10-K | 10-K | S-1/A |
| Net income | -141.9 | -0.1 | -130.3 | -0.1 | -70.3 | -38.3 | 0.0 |
| Depreciation and amortization | 2.1 | | 2.1 | | 0.7 | 0.5 | 0.5 |
| Stock-based compensation | | | | | 4.9 | 2.0 | 0.4 |
| Change in working capital [+] | 30.1 | | 25.9 | | 4.6 | 7.9 | 0.5 |
| Other current assets | | | | | -1.3 | 0.1 | |
| Accounts payable | | | | | 1.5 | 0.9 | -0.3 |
| Accrued expenses | | | | | 4.8 | 0.0 | |
| Other | 30.1 | | 25.9 | | -0.4 | 7.0 | 0.7 |
| Other operating activities | -6.6 | | -3.8 | | 7.1 | -0.5 | -18.5 |
| Cash from operations | -116.3 | | -106.1 | | -53.1 | -28.4 | -17.2 |
| |
| Capital expenditures | 6.5 | | 1.7 | | -0.5 | -0.3 | 0.0 |
| Purchases of property and equipment | 6.5 | | 1.7 | | -0.5 | -0.3 | 0.0 |
| Purchases of short-term investments, net | 291.4 | | 364.6 | | -82.7 | | |
| Purchases of short-term investments | 113.2 | | 225.6 | | -82.7 | | |
| Sales of short-term investments | 178.2 | | 139.0 | | | | |
| Other cash from investing | -239.4 | | -454.5 | | | | |
| Cash from investing | 58.4 | | -88.2 | | -83.2 | -0.3 | 0.0 |
| |
| Issuance of common stock, net | | | | | 267.0 | | |
| Option exercises | 0.4 | | 1.6 | | 0.0 | 0.0 | |
| Other cash from financing | 123.3 | | 3.4 | | 93.9 | 28.4 | 58.5 |
| Cash from financing | 122.9 | | 1.8 | | 360.9 | 28.4 | 58.5 |
| |
| Free cash flow | -109.8 | | -104.5 | | -53.6 | -28.6 | -17.2 |
| Per share (diluted) | ($2.01) | | ($2.73) | | ($3.16) | ($66.03) | ($42,725.05) |