| In millions, except per share items | Jun-30-23 | Mar-31-23 | Dec-31-22 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 |
| | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q |
| Net income | -33.4 | -17.3 | -14.9 | -13.0 | | -20.0 | 5.4 | -46.9 |
| Depreciation and amortization | 11.8 | 9.7 | 9.5 | 9.6 | 9.2 | 7.4 | 4.5 | 3.5 |
| Stock-based compensation | 2.3 | 3.0 | 3.6 | 3.2 | 3.0 | 10.2 | 13.3 | 28.5 |
| Change in working capital [+] | 12.1 | -6.7 | 20.4 | -5.5 | 2.5 | 0.1 | 29.7 | -1.4 |
| Accounts receivable | 1.7 | -5.9 | 2.0 | -1.7 | 2.1 | -2.9 | 2.2 | -0.7 |
| Other | 10.4 | -0.7 | 18.4 | -3.8 | | 3.0 | 27.4 | -0.7 |
| Other operating activities | 8.3 | -5.3 | -23.7 | -5.8 | | -10.4 | -68.0 | -1.3 |
| Cash from operations | 1.0 | -16.6 | -5.0 | -11.6 | -15.1 | -12.7 | -15.1 | -17.6 |
| |
| Capital expenditures [+] | -5.6 | -2.9 | -2.8 | -3.6 | -3.4 | -1.9 | -0.7 | -0.3 |
| Purchases of property and equipment | -5.6 | -2.9 | -2.8 | -3.6 | -3.4 | -1.9 | -0.7 | -0.3 |
| Sales of property and equipment | 0.0 | | | | | | | |
| Purchases of short-term investments, net | -4.6 | 26.3 | | -6.6 | | | | |
| Purchases of short-term investments | -7.6 | -11.8 | | -6.6 | -43.8 | | | |
| Sales of short-term investments | 3.0 | 38.1 | | | | | | |
| Other cash from investing | -7.0 | -12.9 | 5.3 | -5.0 | | -11.5 | -13.4 | -37.7 |
| Cash from investing | -17.2 | 10.5 | 2.5 | -15.2 | -55.5 | -13.4 | -14.1 | -38.1 |
| |
| Option exercises | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 |
| Financing costs | 0.4 | | | | | | | -5.6 |
| Other cash from financing | -0.3 | 28.9 | -0.5 | -0.5 | | -3.6 | -0.3 | 216.0 |
| Cash from financing | -0.7 | 28.9 | -0.5 | -0.5 | -0.4 | -3.6 | -0.3 | 221.5 |
| |
| Free cash flow | -4.6 | -19.5 | -7.8 | -15.3 | -18.5 | -14.6 | -15.9 | -18.0 |
| Per share (diluted) | ($0.03) | ($0.16) | ($0.07) | ($0.13) | | ($0.13) | ($0.22) | ($0.26) |
| |
| Cash paid for interest | | | | 0.0 | 0.0 | | 0.0 | 0.1 |
| Cash paid for income taxes | 0.1 | | | | | | | |