| In millions, except per share items | Jun-30-23 | Mar-31-23 | Dec-31-22 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Sep-30-21 | Jun-30-21 |
| | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-Q | 10-Q |
| Net income | -23.9 | -34.3 | -27.1 | -26.7 | -39.5 | -42.8 | -46.9 | -48.4 |
| Depreciation and amortization | 1.0 | 1.0 | 0.9 | 0.9 | 0.9 | 0.9 | 0.5 | 0.2 |
| Stock-based compensation | 3.7 | 2.8 | 3.5 | 2.9 | 6.3 | 6.3 | 6.8 | 8.6 |
| Change in working capital [+] | 1.1 | 3.9 | -1.7 | -3.8 | 1.8 | -6.4 | -6.0 | 12.0 |
| Other current assets | 0.5 | 3.1 | 1.0 | 1.3 | 1.0 | -0.6 | 1.2 | 0.1 |
| Accounts payable | 0.4 | -1.0 | -0.4 | -3.7 | -0.3 | -1.0 | -7.8 | 9.3 |
| Accrued expenses | 0.3 | 1.9 | | | 1.1 | -4.8 | | |
| Other | | | -2.3 | -1.3 | | | 0.5 | 2.7 |
| Other operating activities | 0.9 | 4.2 | 0.3 | 3.3 | 4.4 | -2.7 | 4.6 | 3.3 |
| Cash from operations | -17.1 | -22.4 | -24.0 | -23.4 | -26.1 | -44.7 | -41.1 | -24.3 |
| |
| Capital expenditures | -0.1 | 0.0 | -0.5 | -0.2 | -0.8 | -0.7 | -6.0 | -4.0 |
| Purchases of property and equipment | -0.1 | 0.0 | -0.5 | -0.2 | -0.8 | -0.7 | -6.0 | -4.0 |
| Purchases of intangible assets | | | | -1.5 | | -1.5 | -5.5 | -1.5 |
| Sales of short-term investments, net [+] | 14.1 | 21.2 | -2.9 | -3.0 | 16.8 | 19.5 | 0.0 | -4.7 |
| Purchases of short-term investments | -22.1 | -51.4 | -41.5 | -57.4 | -21.5 | -37.4 | -37.7 | -71.8 |
| Sales of short-term investments | 36.2 | 72.6 | 38.6 | 54.4 | 38.3 | 56.9 | 37.7 | 67.1 |
| Cash from investing | 14.0 | 21.2 | -3.4 | -4.8 | 16.0 | 17.3 | -11.6 | -10.3 |
| |
| Option exercises | 0.1 | | 0.1 | 0.1 | 0.2 | 0.0 | 0.0 | 0.6 |
| Other cash from financing | 0.2 | | -0.5 | -0.3 | -0.2 | 0.1 | 0.1 | 1.1 |
| Cash from financing | 0.1 | 0.0 | -0.6 | -0.4 | -0.4 | 0.0 | 0.0 | 0.5 |
| |
| Free cash flow | -17.2 | -22.5 | -24.5 | -23.6 | -26.9 | -45.4 | -47.1 | -28.3 |
| Per share (diluted) | ($0.32) | ($0.41) | ($0.45) | ($0.43) | ($0.49) | ($0.84) | ($0.87) | ($0.53) |