| In millions, except per share items | Jun-30-23 | Mar-31-23 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 |
| | 10-Q | 10-Q | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q |
| Net income | -16.0 | -15.0 | -14.6 | -16.6 | -14.0 | -16.9 | -14.2 | 0.8 |
| Depreciation and amortization | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Stock-based compensation | 2.5 | 2.3 | 2.4 | 2.4 | 2.1 | 2.0 | 2.0 | 1.9 |
| Change in working capital | 1.6 | -0.3 | 0.4 | 0.3 | -1.9 | 2.6 | 2.0 | -1.7 |
| Other | 1.6 | -0.3 | 0.4 | 0.3 | -1.9 | 2.6 | 2.0 | -1.7 |
| Other operating activities | 1.4 | -0.9 | 0.2 | -0.2 | -0.2 | -0.1 | 0.8 | 0.0 |
| Cash from operations | -10.6 | -13.9 | -11.6 | -14.1 | -13.9 | -12.4 | -9.4 | 1.0 |
| |
| Capital expenditures | 0.0 | 0.0 | -0.1 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 |
| Purchases of property and equipment | 0.0 | 0.0 | -0.1 | -0.1 | | | | |
| Sales of short-term investments, net [+] | -28.0 | 30.0 | -16.9 | -15.0 | -8.0 | 15.0 | 23.0 | 20.0 |
| Purchases of short-term investments | -55.0 | -15.0 | -39.9 | -15.0 | -8.0 | | -15.0 | |
| Sales of short-term investments | 27.0 | 45.0 | 23.0 | | | 15.0 | 38.0 | 20.0 |
| Cash from investing | -28.0 | 30.0 | -17.1 | -15.1 | -8.0 | 15.0 | 23.0 | 20.0 |
| |
| Issuance of common stock, net | | | 2.6 | | | | | |
| Option exercises | -0.1 | 0.3 | 0.0 | 0.1 | 0.0 | 0.1 | 0.0 | |
| Financing costs | -2.8 | | | | | | | |
| Other cash from financing | -5.7 | 50.5 | 0.1 | 0.3 | 0.1 | 0.2 | 0.0 | 4.9 |
| Cash from financing | -2.8 | 50.3 | 2.7 | 0.1 | 0.0 | 0.1 | 0.0 | 4.9 |
| |
| Free cash flow | -10.6 | -13.9 | -11.7 | -14.1 | -13.9 | -12.4 | -9.4 | 1.0 |
| Per share (diluted) | ($0.24) | ($0.33) | ($0.27) | ($0.33) | ($0.33) | ($0.29) | ($0.22) | $0.03 |