| 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 | -56.4 | -67.3 | -89.8 | -82.1 | -82.9 | -82.4 | -79.1 | -94.2 |
| Depreciation and amortization | 5.2 | 5.8 | 6.2 | 5.9 | 5.9 | 6.0 | 6.6 | 21.2 |
| Stock-based compensation | 10.8 | 11.2 | 13.9 | 23.2 | 18.1 | 17.5 | 18.4 | 22.5 |
| Change in working capital [+] | -17.2 | -8.1 | 2.2 | 1.3 | -20.4 | -7.7 | -16.1 | -1.1 |
| Accounts receivable | -6.7 | 12.1 | -18.9 | 6.9 | -0.9 | 0.7 | -11.5 | -6.0 |
| Inventories | 0.1 | -0.6 | 0.5 | -0.7 | -3.3 | -3.5 | -0.5 | -1.5 |
| Other current assets | 0.0 | 1.7 | 1.6 | -10.4 | -1.2 | 0.5 | -9.9 | -3.8 |
| Accounts payable | -2.2 | 0.8 | 4.3 | 5.9 | -7.8 | -0.9 | 7.6 | 1.2 |
| Accrued expenses | -3.3 | -25.1 | 16.3 | -2.3 | -6.5 | -5.2 | 1.3 | 8.0 |
| Other | -5.2 | 2.9 | -1.6 | 1.9 | -0.7 | 0.7 | -3.0 | 1.0 |
| Other operating activities | 10.4 | -2.0 | 11.9 | 0.7 | -2.7 | -4.6 | -2.4 | -11.9 |
| Cash from operations | -47.2 | -60.5 | -55.5 | -51.0 | -82.0 | -71.3 | -72.6 | -63.6 |
| |
| Capital expenditures | -2.3 | -4.9 | -1.4 | -2.2 | -3.0 | -9.1 | -10.7 | -9.6 |
| Purchases of property and equipment | -2.3 | -4.9 | -1.4 | -2.2 | -3.0 | -9.1 | -10.7 | -9.6 |
| Acquisitions | | | | | | | | -4.9 |
| Purchases of short-term investments, net | 28.4 | 25.7 | -140.6 | | | | | |
| Purchases of short-term investments | -34.7 | -71.3 | -140.6 | | | | | |
| Sales of short-term investments | 63.1 | 97.0 | | | | | | |
| Other cash from investing | | -3.0 | 37.2 | -3.6 | -1.6 | | | |
| Cash from investing | 26.1 | 17.8 | -104.8 | -5.8 | -4.6 | -9.1 | -10.7 | -14.5 |
| |
| Financing costs | | -0.2 | | | | | | |
| Other cash from financing | -0.4 | -1.6 | 204.9 | -3.2 | -0.9 | -0.1 | -0.8 | -0.2 |
| Cash from financing | -0.4 | -1.4 | 204.9 | -3.2 | -0.9 | -0.1 | -0.8 | -0.2 |
| |
| Free cash flow | -49.5 | -65.4 | -56.9 | -53.2 | -85.0 | -80.4 | -83.2 | -73.2 |
| Per share (diluted) | ($12.39) | ($0.28) | ($0.26) | ($0.25) | ($23.80) | ($0.38) | ($0.48) | ($0.34) |
| |
| Cash paid for interest | 0.0 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |