| 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 | 10-K |
| Net income | -58.8 | -19.8 | -76.1 | -32.6 | -73.7 |
| Depreciation and amortization [+] | | | | 0.5 | 0.4 |
| Depreciation | | | | 0.5 | 0.4 |
| Stock-based compensation | | | | 5.5 | 4.6 |
| Change in working capital [+] | 17.6 | 3.3 | 15.7 | -2.2 | 0.4 |
| Other current assets | | | | 0.1 | 0.0 |
| Other | 17.6 | 3.3 | 15.7 | -2.3 | 0.5 |
| Other operating activities | 13.4 | -32.8 | 16.3 | -21.2 | 8.5 |
| Cash from operations | -27.8 | -49.3 | -44.1 | -50.0 | -59.8 |
| |
| Capital expenditures | 0.0 | 0.2 | 0.6 | -1.3 | -3.4 |
| Purchases of property and equipment | 0.0 | 0.2 | 0.6 | -1.3 | -3.4 |
| Acquisitions | | | | -0.2 | -0.1 |
| Purchases of short-term investments | | 19.6 | | | |
| Purchases of short-term investments | | 19.6 | | | |
| Other cash from investing | 0.0 | -20.0 | -1.3 | | |
| Cash from investing | 0.0 | -0.2 | -0.6 | -1.5 | -3.5 |
| |
| Issuance of common stock, net | 18.6 | | 23.1 | | |
| Other cash from financing | -1.5 | 35.0 | 34.2 | 69.3 | 63.2 |
| Cash from financing | 17.2 | 35.0 | 57.3 | 69.3 | 63.2 |
| |
| Free cash flow | -27.8 | -49.1 | -43.4 | -51.4 | -63.1 |
| Per share (diluted) | ($83.75) | ($896.40) | ($81.52) | ($5.49) | ($6.75) |