| 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 |
| Cash flows from operating activities | | | | | | | | |
| Net loss | -2.3 | -5.0 | -7.3 | -6.0 | -2.7 | -2.1 | -2.2 | -1.2 |
| |
| Adjustments to reconcile net loss to net cash used in operating activities: | | | | | | | | |
| Share-based compensation | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 |
| Foreign currency exchange loss (gain) | 0.0 | 0.0 | -0.1 | 0.1 | 0.4 | -0.1 | 0.0 | 0.2 |
| Change in fair value of derivative liability | -0.6 | 0.0 | -1.1 | -0.1 | -0.9 | -2.0 | -2.5 | -1.0 |
| Change in fair value of warrant liability | -0.6 | 0.0 | -1.2 | -0.1 | 0.0 | -0.2 | -0.8 | 0.0 |
| Depreciation of property and equipment | | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Amortization of debt discount and issuance costs | | | 0.0 | 0.0 | 0.1 | 0.1 | 0.1 | 0.1 |
| Amortization of intangible assets | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Gain on extinguishment of convertible debt and derivative liability | | | | | -1.3 | | | |
| Changes in operating assets and liabilities: | | | | | | | | |
| Prepaid expenses and other current assets | 0.8 | 0.0 | 0.5 | -0.3 | -0.6 | 0.1 | 1.3 | -1.4 |
| Accounts payable | 0.8 | 4.0 | 1.2 | 1.0 | 0.3 | 0.2 | 0.0 | 0.2 |
| Accrued liabilities | -1.0 | -1.7 | 2.2 | 0.4 | 0.3 | 0.2 | 0.2 | 0.1 |
| Net cash used in operating activities | -2.1 | -2.6 | -4.6 | -4.6 | -4.5 | -3.4 | -4.0 | -3.0 |
| |
| Cash flows from investing activities | | | | | | | | |
| Purchase of property and equipment | | | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Net cash used in investing activities | 0.1 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.0 |
| Effect of exchange rates on cash | 0.0 | 0.0 | 0.0 | -0.3 | -0.4 | 0.2 | 0.0 | -0.3 |
| Net decrease in cash | -2.1 | -2.5 | | | -4.9 | -3.2 | | |
| |
| Noncash financing activities | | | | | | | | |
| Conversion of convertible debt and derivative liability to Series 1 Convertible Preferred Shares | | | | | 5.6 | | | |
| |
| Supplemental disclosure of cash flow information | | | | | | | | |
| Cash paid for interest on convertible debt | | | | | | 0.1 | | |
| Cash paid for other interest | 0.0 | | | | | | | |