| In millions, except per share items | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | S-1/A |
| Net income | -26.0 | -15.2 | -12.5 | -11.2 | -4.3 | -0.9 |
| Depreciation and amortization [+] | 0.1 | 0.1 | 0.1 | 0.0 | | |
| Depreciation | 0.1 | 0.1 | 0.1 | 0.0 | | |
| Stock-based compensation | 8.2 | 3.3 | 2.0 | 2.3 | 0.3 | 0.0 |
| Change in working capital [+] | 1.1 | 4.0 | 1.4 | 0.3 | 1.1 | 0.2 |
| Accounts receivable | -0.1 | 0.0 | 0.1 | -0.1 | 0.0 | |
| Other current assets | 0.2 | 0.1 | -0.3 | 0.0 | -0.1 | |
| Accounts payable | 2.5 | 0.4 | 1.4 | -0.4 | 1.3 | 0.0 |
| Accrued expenses | -1.5 | 3.6 | 0.1 | 0.7 | 0.0 | |
| Deferred revenues | | | 0.0 | 0.0 | 0.0 | |
| Other | | | 0.0 | 0.0 | 0.0 | 0.2 |
| Other operating activities | -1.1 | 0.0 | 1.0 | 2.2 | 0.3 | 0.0 |
| Cash from operations | -17.7 | -7.8 | -8.1 | -6.5 | -2.5 | -0.7 |
| |
| Capital expenditures [+] | 0.6 | 0.2 | 0.2 | 0.0 | 0.0 | 0.0 |
| Purchases of property and equipment | | 0.0 | 0.0 | -0.2 | | |
| Capitalized product costs | 0.6 | 0.2 | 0.2 | 0.2 | | |
| Other cash from investing | -1.0 | -0.2 | -0.2 | -0.2 | -0.1 | 0.0 |
| Cash from investing | -0.4 | 0.0 | 0.0 | -0.2 | -0.1 | 0.0 |
| |
| Issuance of common stock, net | 29.7 | | 12.1 | 12.6 | 2.2 | |
| Option exercises | 0.2 | 0.1 | 0.1 | | | |
| Other cash from financing | -1.6 | 2.2 | 0.0 | 0.7 | 0.2 | 1.2 |
| Cash from financing | 27.9 | 2.1 | 12.0 | 13.3 | 2.4 | 1.2 |
| |
| Free cash flow | -17.7 | -7.8 | -8.1 | -6.7 | -2.5 | -0.7 |
| Per share (diluted) | ($0.83) | ($0.43) | ($0.57) | ($0.76) | ($0.55) | ($0.18) |
| |
| Cash paid for interest | | 0.0 | | 0.1 | 0.0 | |
| Cash paid for income taxes | 0.0 | 0.0 | 0.0 | | | |