| 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-K | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K |
| Cash flows from operating activities: | | | | | | | | |
| Net loss | -2.3 | -2.4 | -2.5 | -2.0 | -6.3 | | -2.0 | -1.5 |
| Adjustments to reconcile net loss to net cash used in operating activities: | | | | | | | | |
| Stock-based compensation | 0.4 | | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | |
| Depreciation | | | | | | | | |
| Changes in assets and liabilities: | | | | | | | | |
| Accounts receivable | -0.2 | | 0.0 | 0.1 | 0.0 | 0.1 | -0.2 | |
| Accounts payable | 0.3 | | 0.1 | 0.1 | 0.0 | 0.0 | -0.3 | |
| Other assets and liabilities | 0.7 | | -0.6 | -0.1 | 0.1 | 0.0 | 0.1 | -0.1 |
| Net cash used in operating activities | -1.3 | -2.4 | -2.4 | -1.6 | -1.7 | -1.3 | -2.2 | -1.3 |
| |
| Cash flows from investing activities: | | | | | | | | |
| Purchases of property and equipment | -0.5 | | -0.3 | -0.2 | -0.1 | -0.2 | -0.1 | -0.2 |
| Purchases of short-term investments | | | | | | | | |
| Proceeds from short-term investments | | | | | | | | |
| Net cash used in investing activities | 1.2 | | -5.2 | -0.2 | -0.1 | -0.2 | -0.1 | -27.6 |
| |
| Cash flows from financing activities: | | | | | | | | |
| Purchase of treasury shares | -0.1 | | | | | | | |
| Net cash used in financing activities | -0.1 | | -0.5 | 0.0 | 0.0 | 0.0 | -2.0 | |
| Net change in cash and cash equivalents | -0.2 | | -8.2 | -1.9 | -1.8 | -1.5 | -4.3 | |
| |
| Supplemental disclosures of cash flow information: | | | | | | | | |
| Cash paid for interest | 0.0 | | 0.1 | 0.5 | 0.0 | -0.5 | 0.5 | |
| Acquisition of equipment through financing lease | | | | | 0.4 | | | |
| Income taxes paid | | | 0.0 | | | | | |