| 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 | S-1 |
| Net income | -136.1 | -185.4 | -112.2 | -45.6 | -12.8 |
| Depreciation and amortization | 3.7 | 1.5 | 0.8 | 0.1 | |
| Stock-based compensation | 19.0 | 32.7 | 14.6 | 1.5 | |
| Change in working capital [+] | -10.0 | 10.1 | 18.9 | -7.2 | 0.0 |
| Other current assets | 2.7 | 1.8 | 1.9 | -10.1 | -0.1 |
| Accounts payable | -5.4 | 2.2 | 4.6 | 0.4 | 0.2 |
| Accrued expenses | | | | | -0.2 |
| Other | -7.3 | 6.1 | 12.5 | 2.5 | 0.1 |
| Other operating activities | 5.3 | 14.2 | -2.6 | 11.3 | -5.8 |
| Cash from operations | -118.2 | -126.9 | -80.5 | -39.9 | -18.6 |
| |
| Capital expenditures | -2.3 | -17.6 | -1.1 | -1.2 | 0.0 |
| Purchases of property and equipment | -2.3 | -17.6 | -1.1 | -1.2 | 0.0 |
| Purchases of intangible assets | -3.0 | -8.0 | -0.5 | -0.5 | -2.5 |
| Purchases of short-term investments, net | 30.5 | -20.2 | -170.5 | | |
| Purchases of short-term investments | -157.8 | -202.5 | -266.1 | | |
| Sales of short-term investments | 188.3 | 182.4 | 95.6 | | |
| Cash from investing | 25.2 | -45.8 | -172.1 | -1.7 | -2.5 |
| |
| Issuance of common stock, net | | 165.8 | 228.3 | | |
| Option exercises | 0.4 | 1.2 | 0.3 | 0.2 | |
| Financing costs | | | | -0.8 | |
| Other cash from financing | -0.9 | 2.0 | 0.8 | 175.0 | 46.0 |
| Cash from financing | -1.4 | 166.7 | 228.8 | 175.6 | 46.0 |
| |
| Free cash flow | -120.5 | -144.5 | -81.7 | -41.1 | -18.6 |
| Per share (diluted) | ($2.21) | ($2.71) | ($2.11) | ($9.70) | ($5.17) |