| 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 | -19.0 | -17.9 | -18.1 | -18.8 | -18.8 | -16.8 | -14.8 | -11.0 |
| Depreciation and amortization [+] | 0.2 | 0.0 | 0.0 | 0.0 | | | | |
| Depreciation | 0.2 | 0.0 | 0.0 | 0.0 | | | | |
| Stock-based compensation | 0.2 | 0.3 | 0.3 | -0.7 | 0.3 | 0.1 | 0.0 | 1.3 |
| Change in working capital [+] | -2.6 | -2.5 | 0.2 | 3.6 | 3.2 | 1.8 | -0.2 | -2.5 |
| Accounts receivable | 0.0 | 0.0 | 0.1 | 0.4 | 0.1 | 0.1 | 0.0 | -0.2 |
| Other current assets | 0.6 | 0.6 | | 2.2 | 0.7 | 0.3 | 0.0 | -0.5 |
| Accounts payable | -0.4 | -0.1 | -0.2 | 0.6 | -0.2 | -0.3 | 0.0 | -1.2 |
| Deferred revenues | | | | 0.0 | -0.1 | | | -2.0 |
| Other | -2.8 | -3.0 | -1.3 | 0.4 | 2.7 | 2.9 | 2.1 | 1.4 |
| Other operating activities | 1.6 | 0.8 | 0.2 | -2.0 | 1.0 | 0.6 | 0.7 | 1.0 |
| Cash from operations | -19.6 | -19.4 | -17.4 | -17.9 | -14.4 | -14.3 | -14.3 | -11.1 |
| |
| Capital expenditures | 0.2 | 0.2 | 0.2 | -0.3 | 0.0 | 0.0 | 0.0 | 0.0 |
| Purchases of property and equipment | 0.2 | | 0.2 | -0.3 | 0.0 | | | |
| Purchases of short-term investments | 2.0 | -0.9 | 20.7 | -20.7 | | | | |
| Purchases of short-term investments | 2.0 | -0.9 | 20.7 | -20.7 | | | | |
| Other cash from investing | -21.5 | -21.1 | -36.9 | 0.1 | | | | |
| Cash from investing | -19.3 | -21.8 | -16.0 | -21.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| |
| Issuance of common stock, net | 8.5 | 8.6 | | | | | | 55.9 |
| Option exercises | | | | | | 0.1 | | 0.1 |
| Other cash from financing | | | | | | 0.3 | | 0.1 |
| Cash from financing | 8.5 | 8.6 | -0.2 | -0.2 | -0.2 | 41.3 | 41.1 | 56.0 |
| |
| Free cash flow | -19.4 | -19.2 | -17.2 | -18.2 | -14.4 | -14.3 | -14.3 | -11.1 |
| Per share (diluted) | ($0.93) | ($0.94) | ($0.86) | ($1.00) | ($0.79) | ($0.71) | ($0.87) | ($0.80) |
| |
| Cash paid for interest | | | | | | 0.0 | 0.0 | |