| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 |
| | 10-K | 10-K | S-1/A |
| Net income | -18.1 | -9.8 | -4,250.3 |
| Depreciation and amortization [+] | 0.0 | 0.0 | 11.7 |
| Depreciation | 0.0 | 0.0 | 6.7 |
| Amortization of intangible assets | 0.0 | 0.0 | 5.0 |
| Stock-based compensation | 0.5 | 0.5 | 354.4 |
| Change in working capital [+] | 5.4 | -0.2 | 66.0 |
| Other current assets | -0.3 | -0.6 | 113.0 |
| Accounts payable | 2.7 | 0.0 | 68.9 |
| Accrued expenses | 3.0 | 0.5 | -116.0 |
| Other operating activities | -4.9 | 0.1 | 585.7 |
| Cash from operations | -17.0 | -9.3 | -3,232.5 |
| |
| Capital expenditures [+] | 0.0 | 0.0 | -80.7 |
| Purchases of property and equipment | 0.0 | 0.0 | -80.7 |
| Sales of property and equipment | | 0.1 | |
| Purchases of short-term investments, net | | 0.0 | -0.2 |
| Purchases of short-term investments | 0.0 | 0.0 | -31.2 |
| Sales of short-term investments | 0.0 | 0.0 | 31.1 |
| Other cash from investing | | 0.0 | -2.2 |
| Cash from investing | 0.0 | 0.1 | -83.1 |
| |
| Issuance of common stock, net | 5.0 | 15.9 | |
| Other cash from financing | 1.5 | 9.7 | 2,864.9 |
| Cash from financing | 6.5 | 25.5 | 2,864.9 |
| |
| Free cash flow | -17.0 | -9.3 | -3,313.2 |
| Per share (diluted) | ($2.27) | ($1.61) | |
| |
| Cash paid for interest | 0.1 | | |