| In millions, except per share items | Jun-30-23 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 | Mar-31-21 |
| | 10-Q | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q |
| Net income | | -87.5 | -123.0 | -55.0 | -24.2 | -6.8 | 19.4 | -24.2 |
| Depreciation and amortization [+] | | 12.9 | 8.7 | 5.6 | 3.2 | 1.8 | 1.4 | 0.7 |
| Depreciation | | 1.4 | 1.4 | 3.8 | 1.4 | 0.0 | 0.1 | 0.4 |
| Amortization of intangible assets | | | 0.1 | 0.1 | 0.1 | | 0.2 | 0.4 |
| Stock-based compensation | | 8.8 | 10.9 | 10.4 | 7.8 | 5.6 | 1.5 | 1.0 |
| Change in working capital [+] | | -0.1 | -3.2 | 7.4 | -3.6 | -15.6 | -3.2 | -5.2 |
| Accounts receivable | | -3.2 | -2.8 | -2.3 | -1.4 | -1.3 | -1.7 | 0.3 |
| Inventories | | -7.4 | -5.2 | -3.6 | -2.0 | -0.1 | 0.7 | 0.0 |
| Other current assets | | 1.4 | -0.6 | 2.0 | -5.5 | -6.0 | -4.3 | -1.8 |
| Other | | 9.0 | 5.4 | 11.4 | 5.3 | -8.2 | 2.2 | -3.7 |
| Other operating activities | | 78.5 | 86.0 | 9.2 | -44.8 | -47.7 | -49.8 | 3.4 |
| Cash from operations | | 12.6 | -20.6 | -22.4 | -61.7 | -62.7 | -30.6 | -24.3 |
| |
| Capital expenditures | | -208.3 | -219.2 | -183.0 | -152.0 | -28.2 | -6.0 | -4.8 |
| Purchases of property and equipment | | -208.3 | -219.2 | -183.0 | -152.0 | -28.2 | -6.0 | -4.8 |
| Acquisitions | | -4.1 | -2.4 | | -0.2 | | | |
| Sales of short-term investments, net [+] | | 12.8 | 10.6 | 10.9 | 1.3 | -2.9 | | -0.7 |
| Purchases of short-term investments | | | -4.7 | -2.9 | -2.8 | -3.6 | | |
| Sales of short-term investments | | 15.4 | 15.4 | 13.8 | 4.1 | | | 0.7 |
| Other cash from investing | | -175.9 | -179.9 | -168.9 | -182.6 | -40.9 | -27.0 | -15.3 |
| Cash from investing | | -375.5 | -390.9 | -341.1 | -333.5 | -75.6 | -37.4 | -24.4 |
| |
| Cash dividends paid | | -0.2 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Issuance of common stock, net | | 181.5 | 198.8 | 171.0 | 186.9 | 197.7 | 184.0 | 165.0 |
| Other cash from financing | | 151.6 | 136.6 | 129.2 | 211.1 | -16.4 | -12.3 | -9.0 |
| Cash from financing | | 332.9 | 335.4 | 300.2 | 397.9 | 181.3 | 171.7 | 155.9 |
| |
| Free cash flow | | -195.8 | -239.8 | -205.4 | -213.7 | -90.9 | -36.6 | -29.1 |
| Per share (diluted) | | ($1.77) | ($4.65) | ($3.21) | ($4.16) | ($2.28) | ($1.33) | ($1.77) |
| |
| Cash paid for interest | | 4.7 | 3.7 | 2.2 | 0.3 | 1.3 | | 1.3 |