| 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 | 8-K | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q |
| Net income | -22.0 | -35.6 | -151.6 | -78.5 | -62.6 | -148.1 | -105.5 | 50.8 |
| Depreciation and amortization | 0.7 | 0.6 | 1.9 | 4.6 | 5.8 | 5.5 | 5.6 | 5.0 |
| Asset impairment charges | 0.5 | | 120.5 | 47.6 | | | | |
| Stock-based compensation | 14.6 | 10.5 | 10.6 | 5.8 | 13.4 | 77.9 | 17.8 | 15.8 |
| Deferred taxes | | | -0.2 | | -0.2 | -0.3 | -0.6 | -18.8 |
| Change in working capital [+] | 3.0 | 0.6 | 60.8 | 4.8 | -18.6 | -15.9 | 50.6 | 10.8 |
| Accounts receivable | -0.1 | -2.4 | 1.1 | 1.6 | 2.3 | 0.3 | 0.0 | 1.0 |
| Other current assets | -1.8 | | 13.8 | 2.8 | 0.6 | -5.7 | 0.9 | -2.8 |
| Accounts payable | -0.5 | 3.0 | -3.2 | 3.2 | -11.6 | -5.6 | 9.7 | -0.7 |
| Other | 5.4 | | 49.0 | -2.9 | -9.8 | -4.9 | 40.0 | 13.4 |
| Other operating activities | -23.2 | 9.1 | -54.8 | -6.0 | 0.6 | -2.6 | -44.8 | -101.9 |
| Cash from operations | -26.4 | -14.7 | -12.8 | -21.8 | -61.6 | -83.5 | -76.8 | -38.3 |
| |
| Capital expenditures | -11.6 | 0.0 | 0.1 | -1.6 | -0.2 | -0.1 | -1.2 | -0.6 |
| Purchases of property and equipment | -11.6 | | 0.1 | -1.6 | -0.2 | -0.1 | -1.2 | -0.6 |
| Acquisitions | | | | | | | | -84.0 |
| Purchases of short-term investments, net | 72.0 | 79.4 | 135.3 | 101.3 | 117.3 | -40.6 | -504.0 | |
| Purchases of short-term investments | | | -21.2 | -105.4 | -178.0 | -149.5 | -504.0 | |
| Sales of short-term investments | 72.0 | 79.4 | 156.5 | 206.7 | 295.3 | 108.9 | | |
| Other cash from investing | 11.6 | -11.6 | | | | | 2.1 | -52.7 |
| Cash from investing | 72.0 | 67.8 | 135.3 | 99.7 | 117.1 | -40.7 | -503.1 | -137.3 |
| |
| Repurchase of common stock, net | | | | | | | 0.0 | |
| Option exercises | 0.1 | | 0.5 | | 0.6 | 0.2 | 0.7 | 3.1 |
| Financing costs | | | | 0.0 | 0.0 | -2.0 | 0.0 | |
| Other cash from financing | -135.9 | -0.2 | 0.6 | -8.1 | 0.5 | -4.3 | 281.7 | 26.2 |
| Cash from financing | -135.9 | -0.2 | 0.1 | -8.1 | -0.1 | -2.6 | 281.0 | 23.2 |
| |
| Free cash flow | -38.0 | -14.7 | -12.7 | -23.4 | -61.8 | -83.6 | -78.0 | -38.9 |
| Per share (diluted) | ($1.81) | | ($0.03) | ($0.06) | ($3.03) | ($0.21) | ($0.20) | ($0.10) |
| |
| Cash paid for interest | 12.2 | | 14.9 | 0.3 | 15.0 | 0.1 | 0.0 | 0.1 |