| In millions, except per share items | Jun-30-23 | Mar-31-23 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 |
| | 10-Q | 10-Q | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q |
| Net income | -31.4 | -23.4 | -22.5 | -5.7 | -20.2 | -14.9 | -15.7 | 6.3 |
| Depreciation and amortization | 0.2 | 0.1 | 0.1 | 0.1 | 0.0 | 0.0 | 0.1 | 0.1 |
| Stock-based compensation | 5.2 | 3.9 | 3.6 | 3.5 | 2.7 | 2.2 | 2.1 | 2.8 |
| Change in working capital [+] | 3.5 | -4.6 | 3.4 | -2.3 | 1.8 | 3.9 | 20.6 | 4.1 |
| Accounts receivable | 2.5 | -2.5 | | | 0.0 | | 20.0 | 5.0 |
| Other current assets | | | 0.3 | | | -1.4 | 1.5 | -1.2 |
| Other | 1.0 | -2.1 | 3.2 | -2.3 | 1.9 | 5.3 | -0.9 | 0.3 |
| Other operating activities | -1.3 | 2.0 | -3.2 | 0.2 | 0.4 | -3.4 | 0.0 | 7.2 |
| Cash from operations | -23.8 | -22.0 | -18.6 | -4.3 | -15.3 | -12.1 | 7.1 | 20.6 |
| |
| Capital expenditures | -0.8 | -0.3 | -0.1 | -0.1 | -0.2 | -0.3 | -0.1 | 0.0 |
| Purchases of property and equipment | -0.8 | -0.3 | -0.1 | -0.1 | -0.2 | -0.3 | -0.1 | 0.0 |
| Sales of short-term investments, net [+] | 64.9 | 11.6 | -57.0 | | | | | |
| Purchases of short-term investments | | -28.7 | -57.0 | | | | | |
| Sales of short-term investments | 64.9 | 40.3 | | | | | | |
| Cash from investing | 64.1 | 11.3 | -57.1 | -0.1 | -0.2 | -0.3 | -0.1 | 0.0 |
| |
| Issuance of common stock, net | | | -0.2 | 74.6 | | | | |
| Option exercises | 0.5 | 0.0 | | 0.2 | | 0.2 | | |
| Financing costs | | | | -0.1 | -0.8 | | | |
| Other cash from financing | 1.0 | 5.0 | 0.1 | 0.3 | 18.3 | 0.2 | 0.1 | 0.0 |
| Cash from financing | 0.5 | 5.0 | -0.1 | 74.7 | 19.1 | -0.1 | 0.1 | 0.0 |
| |
| Free cash flow | -24.6 | -22.3 | -18.7 | -4.4 | -15.4 | -12.4 | 7.0 | 20.5 |
| Per share (diluted) | ($0.92) | ($0.83) | ($0.70) | ($0.18) | ($0.75) | ($0.60) | $0.34 | $0.93 |
| |
| Cash paid for interest | 0.7 | 0.6 | 1.0 | | 0.1 | | | |