| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 |
| | 10-K | 10-K | 10-K | 20-F | 20-F | 20-F |
| Net income | 13.1 | 12.2 | 11.2 | 0.0 | 0.0 | 0.0 |
| Depreciation and amortization [+] | 0.1 | 0.1 | 0.1 | | | |
| Depreciation | 0.1 | 0.1 | 0.1 | | | |
| Stock-based compensation | 2.2 | 1.9 | 0.9 | | | |
| Deferred taxes | 0.2 | -0.2 | | | | |
| Change in working capital [+] | -1.8 | 1.6 | -0.2 | 0.7 | -0.5 | 0.9 |
| Accounts receivable | -0.1 | 0.1 | 0.0 | | | |
| Other current assets | 0.0 | 0.0 | -0.1 | | | |
| Accounts payable | -0.1 | 0.0 | -0.2 | | | |
| Accrued expenses | -1.6 | 1.5 | 0.0 | | | |
| Other | | | | 0.7 | -0.5 | 0.9 |
| Other operating activities | -26.2 | -24.5 | -22.5 | | | |
| Cash from operations | -12.5 | -9.1 | -10.6 | 0.7 | -0.5 | 0.9 |
| |
| Capital expenditures | 0.0 | 0.0 | -0.1 | 0.0 | 0.0 | 0.0 |
| Purchases of property and equipment | 0.0 | 0.0 | -0.1 | | | |
| Other cash from investing | -0.1 | | | | | |
| Cash from investing | -0.1 | 0.0 | -0.1 | 0.0 | 0.0 | 0.0 |
| |
| Issuance of common stock, net | | 21.8 | 3.2 | | | |
| Option exercises | | | | 0.1 | | |
| Other cash from financing | 0.0 | 3.6 | 0.9 | 0.2 | | |
| Cash from financing | 0.0 | 25.4 | 4.1 | 0.1 | 0.0 | 0.0 |
| |
| Free cash flow | -12.5 | -9.1 | -10.6 | 0.7 | -0.5 | 0.9 |
| Per share (diluted) | ($0.44) | ($0.35) | ($0.58) | | | |
| |
| Cash paid for income taxes | 0.2 | 0.0 | 0.1 | | | |