| In millions, except per share items | Jun-30-23 | Jun-05-23 | Mar-31-23 | Mar-05-23 | Dec-31-22 | Dec-05-22 | Sep-30-22 | Sep-05-22 |
| | 10-Q | 8-K | 10-Q | 8-K | 10-K | 8-K | 10-Q | 8-K |
| Net income | -33.3 | 0.0 | -30.8 | 0.0 | -32.6 | -32.6 | -28.3 | -28.3 |
| Depreciation and amortization | 0.8 | | 0.8 | | 0.7 | | 0.7 | |
| Change in working capital | | | 7.8 | | 17.5 | | 9.5 | |
| Other | | | 7.8 | | 17.5 | | 9.5 | |
| Other operating activities | 10.7 | | 1.5 | | 7.0 | | 3.3 | |
| Cash from operations | -21.8 | | -20.8 | | -7.3 | | -14.8 | |
| |
| Capital expenditures | 10.3 | | 4.8 | | 35.0 | | 7.7 | |
| Purchases of property and equipment | 10.3 | | 4.8 | | 35.0 | | 7.7 | |
| Purchases of short-term investments | | | | | 75.6 | | 135.3 | |
| Purchases of short-term investments | | | | | 75.6 | | 135.3 | |
| Other cash from investing | -13.5 | | 32.1 | | -105.9 | | -222.1 | |
| Cash from investing | -3.2 | | 36.9 | | 4.7 | | -79.1 | |
| |
| Option exercises | 0.4 | | 0.0 | | 0.0 | | 1.0 | |
| Other cash from financing | 0.8 | | 0.0 | | 0.5 | | 3.5 | |
| Cash from financing | 0.4 | | 0.0 | | 0.4 | | 2.6 | |
| |
| Free cash flow | -11.4 | | -15.9 | | 27.7 | | -7.1 | |
| Per share (diluted) | ($0.23) | | ($0.33) | | $0.64 | | ($0.15) | |