| In millions, except per share items | Jun-30-23 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 | Mar-31-21 | Dec-31-20 |
| | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K |
| Net income | | -63.5 | -56.8 | -47.8 | -40.4 | -33.8 | -27.2 | -22.7 |
| Depreciation and amortization | | 1.0 | 0.8 | 0.6 | 0.6 | 0.5 | 0.5 | 0.4 |
| Stock-based compensation | | | | 2.0 | 1.6 | | | 1.0 |
| Change in working capital [+] | | | | 4.7 | 1.7 | | | 1.6 |
| Other current assets | | | | 1.7 | 0.4 | | | 0.6 |
| Accounts payable | | | | 0.8 | -0.3 | | | 0.1 |
| Accrued expenses | | | | 2.2 | 1.6 | | | 1.0 |
| Other | | | | 0.0 | | | | |
| Other operating activities | | 2.2 | 2.0 | 0.4 | 0.6 | 0.9 | 0.6 | 0.4 |
| Cash from operations | | -53.5 | -47.2 | -40.0 | -35.8 | -30.5 | -23.0 | -19.2 |
| |
| Capital expenditures | | 0.5 | -0.2 | -1.4 | -0.5 | -0.1 | -0.8 | -1.3 |
| Purchases of property and equipment | | 0.5 | -0.2 | -1.4 | -0.5 | -0.1 | -0.8 | -1.3 |
| Purchases of short-term investments, net | | 92.3 | 184.9 | 179.2 | 73.2 | 58.0 | -78.6 | -132.0 |
| Purchases of short-term investments | | -13.1 | 79.5 | 73.8 | 31.8 | 39.7 | -104.8 | -158.2 |
| Sales of short-term investments | | | | 105.4 | 41.4 | | | 26.2 |
| Other cash from investing | | -50.1 | -261.9 | | | -274.2 | -33.2 | 0.0 |
| Cash from investing | | 42.8 | -77.3 | -96.4 | -201.5 | -216.2 | -112.5 | -133.3 |
| |
| Issuance of common stock, net | | | | | | 139.5 | | |
| Option exercises | | 0.3 | 0.3 | 0.3 | 0.1 | | 1.7 | 1.6 |
| Other cash from financing | | 0.3 | -1.8 | -1.8 | -2.9 | 130.8 | 132.8 | 132.8 |
| Cash from financing | | 0.0 | 137.4 | 137.4 | 136.5 | 268.6 | 131.1 | 131.1 |
| |
| Free cash flow | | -53.0 | -47.5 | -41.4 | -36.3 | -30.6 | -23.8 | -20.5 |
| Per share (diluted) | | ($1.40) | ($1.37) | ($1.59) | ($1.77) | ($2.55) | ($3.51) | ($3.12) |