| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Jun-30-19 | Jun-30-18 | Jun-30-17 | Jun-30-16 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Net income | -157.0 | -125.8 | -59.5 | -15.0 | -17.3 | -9.0 | -6.3 | -3.0 |
| Depreciation and amortization [+] | | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.1 |
| Depreciation | | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.1 |
| Stock-based compensation | 44.2 | 40.5 | 20.8 | 3.2 | 1.2 | 0.5 | 0.7 | 1.2 |
| Change in working capital [+] | 10.6 | -7.9 | 10.8 | 0.1 | 1.7 | 0.5 | -0.6 | 0.7 |
| Accounts receivable | -0.5 | | | | | | | |
| Accounts payable | 0.4 | 2.8 | 7.8 | 0.2 | 0.2 | 0.2 | -0.7 | 0.4 |
| Accrued expenses | 3.3 | -0.4 | 3.4 | -0.6 | 1.2 | 0.2 | -0.3 | 0.2 |
| Other | 7.3 | -10.3 | -0.4 | 0.5 | 0.3 | 0.1 | 0.4 | 0.1 |
| Other operating activities | -1.5 | 1.2 | 0.0 | -0.4 | 3.9 | 2.0 | -0.3 | -12.1 |
| Cash from operations | -103.8 | -91.9 | -27.8 | -12.1 | -10.5 | -6.0 | -6.5 | -13.1 |
| |
| Capital expenditures | 0.0 | 0.0 | 0.0 | -84.8 | 0.0 | 0.0 | 0.0 | -0.6 |
| Purchases of property and equipment | | | | -84.8 | | 0.0 | 0.0 | -0.6 |
| Sales of short-term investments | 67.0 | 168.9 | | | | | | |
| Sales of short-term investments | 67.0 | 168.9 | | | | | | |
| Other cash from investing | -47.3 | -223.0 | -34.4 | 4.7 | | | | |
| Cash from investing | 19.7 | -54.1 | -34.4 | -80.2 | 0.0 | 0.0 | 0.0 | -0.6 |
| |
| Issuance of common stock, net | 0.0 | 184.6 | 19.8 | | | | | |
| Option exercises | | | 0.7 | | | | | |
| Other cash from financing | 45.0 | 3.3 | 9.4 | 126.1 | 17.5 | 6.5 | -0.3 | -0.3 |
| Cash from financing | 45.0 | 187.9 | 28.5 | 126.1 | 17.5 | 6.5 | -0.3 | -0.3 |
| |
| Free cash flow | -103.8 | -91.9 | -27.8 | -96.9 | -10.5 | -6.0 | -6.5 | -13.7 |
| Per share (diluted) | ($3.50) | ($5.23) | ($1.78) | ($10.49) | ($1.66) | ($0.48) | ($0.54) | ($1.18) |
| |
| Cash paid for interest | | | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |