| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 |
| | 10-K | 10-K | 10-K | S-1/A |
| Revenue: | | | | |
| Total revenue | 17.1 | 23.2 | 16.1 | 16.5 |
| Total revenue growth | -26.3% | 44.5% | -2.6% | |
| Costs and operating expenses: | | | | |
| Cost of revenue | | | | |
| Research and development | 12.9 | 9.8 | 6.5 | 5.4 |
| Sales and marketing | 15.0 | 11.8 | 6.0 | 4.0 |
| General and administrative | 26.8 | 17.9 | 10.0 | 8.9 |
| Total costs and operating expenses | 80.4 | 70.5 | 46.6 | 35.1 |
| Loss from operations | -63.2 | -47.2 | -30.5 | -18.6 |
| Operating margin | -369.0% | -203.3% | -190.0% | -112.9% |
| |
| Other income (expense): | | | | |
| Interest income, net | 1.8 | -2.6 | | |
| Other (expense) income, net | 0.1 | -0.9 | 0.0 | 0.0 |
| Total other income (expense), net | 1.8 | -26.2 | -6.4 | 0.0 |
| Loss before income taxes | -61.4 | -73.4 | | |
| Income tax expense (benefit) | -0.6 | 0.1 | 0.1 | 0.4 |
| Net loss | -60.8 | -73.5 | -37.1 | -21.2 |
| |
| Net loss per share - basic (in dollars per share) | ($1.43) | ($3.94) | ($126.11) | |
| Net loss per share - diluted (in dollars per share) | ($1.43) | ($3.94) | ($126.11) | |
| |
| Weighted average common shares outstanding - basic (in shares) | 42.5 | 19.8 | 0.4 | |
| Weighted average common shares outstanding - diluted (in shares) | 42.5 | 19.8 | 0.4 | |