| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 |
| | 8-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Net income | -72.9 | -64.1 | -29.9 | -22.4 | -15.8 | -19.4 | -11.2 | -8.7 |
| Depreciation and amortization [+] | | 4.2 | 0.4 | 0.3 | 0.6 | 0.6 | 0.4 | 0.3 |
| Depreciation | | 0.8 | 0.3 | 0.3 | 0.4 | 0.3 | 0.1 | 0.0 |
| Amortization of intangible assets | | 3.4 | 0.1 | | 0.1 | 0.2 | 0.2 | 0.2 |
| Asset impairment charges | | | 0.4 | | 0.6 | | | |
| Stock-based compensation | | 6.8 | 5.1 | 3.0 | 1.5 | 1.6 | 0.9 | 1.8 |
| Deferred taxes | | -9.3 | -1.3 | | | | | |
| Change in working capital [+] | | 3.1 | 8.1 | 2.7 | 5.8 | -0.7 | 2.3 | 2.3 |
| Accounts receivable | | -1.2 | -0.2 | | | | | |
| Other current assets | | 0.2 | -0.2 | -0.2 | 0.0 | 0.1 | 0.1 | -0.3 |
| Other | | 4.1 | 8.4 | 2.9 | 5.8 | -0.8 | 2.2 | 2.6 |
| Other operating activities | | 23.3 | -8.8 | -3.4 | -4.4 | 4.5 | | 0.1 |
| Cash from operations | | -35.9 | -26.0 | -19.7 | -11.6 | -13.4 | -7.5 | -4.2 |
| |
| Capital expenditures | | -2.2 | -1.2 | -0.9 | 0.0 | -0.1 | -0.1 | -0.5 |
| Purchases of property and equipment | | -2.2 | -1.2 | -0.9 | 0.0 | -0.1 | -0.1 | -0.5 |
| Acquisitions | | -11.7 | -6.5 | | | | | |
| Other cash from investing | | | -4.0 | -11.5 | | 0.9 | -0.1 | 0.8 |
| Cash from investing | | -14.0 | -11.7 | -12.4 | 0.0 | 0.8 | -0.2 | 0.3 |
| |
| Issuance of common stock, net | | 78.0 | 20.8 | 48.9 | 10.0 | | | 11.6 |
| Option exercises | | 2.6 | 1.4 | 0.9 | 0.1 | 0.6 | 0.2 | 0.0 |
| Other cash from financing | | 3.0 | 3.4 | 0.0 | 2.2 | 10.6 | 10.1 | 0.0 |
| Cash from financing | | 78.4 | 22.8 | 47.9 | 12.1 | 10.0 | 9.9 | 11.7 |
| |
| Free cash flow | | -38.2 | -27.2 | -20.6 | -11.7 | -13.5 | -7.6 | -4.7 |
| Per share (diluted) | | ($0.43) | ($0.42) | ($0.40) | ($0.31) | ($0.45) | ($0.29) | ($0.23) |
| |
| Cash paid for interest | | 0.1 | 0.2 | 0.2 | 0.1 | 0.1 | 0.0 | |