| 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 | -5.8 | -4.5 | -4.3 | -4.5 | -4.6 | -4.6 | -5.0 | -4.5 |
| Depreciation and amortization [+] | 0.2 | 0.0 | 0.0 | 0.0 | | | | |
| Depreciation | 0.2 | 0.0 | 0.0 | 0.0 | | | | |
| Stock-based compensation | 0.1 | 0.1 | -0.4 | 0.4 | 0.1 | 0.1 | -1.3 | 1.3 |
| Change in working capital [+] | 0.4 | -1.8 | -0.7 | -0.6 | 0.5 | 1.0 | 2.7 | -1.0 |
| Accounts receivable | 0.0 | 0.0 | -0.1 | 0.1 | 0.0 | 0.1 | 0.2 | -0.2 |
| Other current assets | 0.4 | -0.8 | | 1.0 | 0.4 | 0.3 | 0.5 | -0.5 |
| Accounts payable | -0.2 | -0.2 | 0.3 | -0.3 | 0.1 | -0.3 | 1.2 | -1.2 |
| Deferred revenues | | | | 0.0 | 0.0 | | | -0.1 |
| Other | 0.3 | -0.8 | -0.9 | -1.3 | 0.0 | 0.9 | 0.8 | 1.0 |
| Other operating activities | 0.5 | 0.2 | 1.8 | -0.8 | -0.4 | -0.4 | -0.5 | 2.2 |
| Cash from operations | -4.6 | -6.0 | -3.6 | -5.5 | -4.4 | -3.9 | -4.1 | -2.0 |
| |
| Capital expenditures | 0.0 | 0.0 | 0.5 | -0.3 | 0.0 | 0.0 | 0.0 | 0.0 |
| Purchases of property and equipment | 0.0 | | 0.5 | -0.3 | 0.0 | | | |
| Purchases of short-term investments | 2.9 | -21.6 | 41.5 | -20.7 | | | | |
| Purchases of short-term investments | 2.9 | -21.6 | 41.5 | -20.7 | | | | |
| Other cash from investing | -0.4 | 15.8 | -37.0 | 0.1 | | | | |
| Cash from investing | 2.5 | -5.8 | 5.0 | -20.9 | 0.0 | 0.0 | 0.0 | 0.0 |
| |
| Issuance of common stock, net | 0.0 | 8.6 | | | | | | 0.0 |
| Option exercises | | | | | | 0.0 | | 0.0 |
| Other cash from financing | | | | | | -0.2 | | 0.1 |
| Cash from financing | 0.0 | 8.6 | 0.0 | 0.0 | 0.0 | -0.2 | 0.0 | 0.0 |
| |
| Free cash flow | -4.6 | -6.0 | -3.1 | -5.8 | -4.4 | -3.9 | -4.1 | -2.0 |
| Per share (diluted) | ($0.88) | ($0.22) | ($0.12) | ($0.23) | ($1.04) | ($0.16) | ($0.22) | ($0.08) |
| |
| Cash paid for interest | | | | | | 0.0 | 0.0 | |