| In millions, except per share items | Jun-30-23 | Dec-31-22 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 |
| | 10-Q | 10-K | 8-K | 10-Q | 10-Q | 10-K | 10-Q | 10-Q |
| Net income | | -42.8 | -38.3 | -42.2 | -49.2 | -54.4 | -59.6 | -61.3 |
| Depreciation and amortization | | | | 2.6 | 2.6 | 2.5 | 2.2 | 2.3 |
| Stock-based compensation | | | | | | -11.1 | -7.4 | |
| Change in working capital [+] | | | | | | 13.2 | 0.4 | |
| Accounts receivable | | | | | | 2.1 | -0.1 | |
| Inventories | | | | | | 8.0 | -4.0 | |
| Accounts payable | | | | | | -7.4 | -2.2 | |
| Other | | | | | | 10.5 | | |
| Other operating activities | | | | 8.0 | 6.6 | 15.9 | 22.8 | 17.7 |
| Cash from operations | | | | -29.6 | -37.9 | -33.9 | -41.6 | -40.2 |
| |
| Capital expenditures | | | | 1.3 | 1.3 | 1.4 | 2.8 | 2.7 |
| Purchases of property and equipment | | | | 1.3 | 1.3 | 1.4 | 2.8 | 2.7 |
| Sales of short-term investments | | | | 48.7 | 51.5 | 65.7 | 68.4 | 58.4 |
| Sales of short-term investments | | | | 48.7 | 51.5 | 65.7 | 68.4 | 58.4 |
| Other cash from investing | | | | -65.5 | -52.9 | -54.3 | -10.6 | -27.6 |
| Cash from investing | | | | -15.4 | -0.1 | 12.7 | 60.6 | 33.5 |
| |
| Issuance of common stock, net | | | | 2.9 | | 2.7 | -0.4 | -0.4 |
| Option exercises | | | | 9.8 | 10.4 | 9.4 | 9.9 | 11.0 |
| Other cash from financing | | | | 26.2 | 27.0 | 40.9 | 40.7 | 41.5 |
| Cash from financing | | | | 19.3 | 19.3 | 34.3 | 30.5 | 30.1 |
| |
| Free cash flow | | | | -28.3 | -36.6 | -32.6 | -38.8 | -37.5 |
| Per share (diluted) | | | | ($0.16) | ($0.21) | ($0.19) | ($0.23) | ($0.22) |
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