| In millions, except per share items | Dec-31-21 | Dec-31-20 |
| | 10-K | 10-K |
| Net income | -87.5 | -53.0 |
| Depreciation and amortization | 2.6 | 2.8 |
| Asset impairment charges | 0.7 | 0.1 |
| Stock-based compensation | 28.4 | 15.2 |
| Change in working capital [+] | 20.6 | 5.9 |
| Accounts receivable | 0.4 | -13.3 |
| Inventories | -3.0 | 0.5 |
| Other current assets | -3.9 | 0.2 |
| Accounts payable | 6.5 | 4.0 |
| Accrued expenses | 4.5 | 1.2 |
| Other | 16.1 | 13.3 |
| Other operating activities | -1.7 | 0.7 |
| Cash from operations | -37.0 | -28.3 |
| |
| Capital expenditures [+] | -6.7 | -1.2 |
| Purchases of property and equipment | -6.7 | -1.2 |
| Sales of property and equipment | 0.0 | 0.1 |
| Purchases of short-term investments, net | -178.7 | -8.4 |
| Purchases of short-term investments | -279.9 | -45.7 |
| Sales of short-term investments | 101.2 | 37.3 |
| Cash from investing | -185.4 | -9.5 |
| |
| Issuance of common stock, net | 357.2 | |
| Option exercises | 3.9 | 1.1 |
| Other cash from financing | 144.2 | 189.9 |
| Cash from financing | 497.5 | 188.8 |
| |
| Free cash flow | -43.7 | -29.5 |
| Per share (diluted) | ($0.32) | ($0.45) |
| |
| Cash paid for interest | 1.6 | 3.7 |