| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 |
| | 10-K | 10-K | 10-K | 10-K | S-1/A |
| Revenue | 9.7 | 7.6 | 41.8 | 57.1 | -24.4 |
| Revenue growth | 27.9% | -81.9% | -26.7% | -333.7% | |
| Operating expenses: | | | | | |
| Research and development | 96.9 | 77.5 | 66.2 | 47.4 | |
| General and administrative | 39.9 | 27.6 | 17.3 | 10.9 | 6.5 |
| Total operating expenses | 136.9 | 105.1 | 83.5 | 58.3 | 30.9 |
| Loss from operations | -127.2 | -97.5 | -41.6 | -1.2 | -30.9 |
| Operating margin | -1313.4% | -1288.1% | -99.6% | -2.2% | |
| Interest and other income (expense), net | 4.7 | 0.3 | 0.1 | 0.6 | |
| Net loss | -123.3 | -97.3 | -41.5 | -0.6 | -30.3 |
| |
| Net loss attributable to common stockholders, basic | ($2.94) | ($2.71) | ($1.95) | ($4.22) | ($30.16) |
| Net loss attributable to common stockholders, diluted | -123.3 | -97.3 | -41.5 | -6.9 | 0.0 |
| |
| Net loss per share, attributable to common stockholders - basic and diluted | | | | | |
| Net loss per share, attributable to common stockholders- basic(USD per share) | ($2.94) | ($2.71) | ($1.95) | ($4.22) | ($30.16) |
| Net loss per share, attributable to common stockholders- diluted (USD per share) | ($2.94) | ($2.71) | ($1.95) | ($4.22) | ($30.16) |
| |
| Shares used in computing net loss per share attributable to common stockholders - basic and diluted | | | | | |
| Shares used in computing net loss per share attributable to common stockholders - basic | 42.0 | 35.8 | 21.3 | 1.6 | 0.0 |
| Shares used in computing net loss per share attributable to common stockholders - diluted | 42.0 | 35.8 | 21.3 | 1.6 | 0.0 |
| |
| Comprehensive loss: | | | | | |
| Net loss | -123.3 | -97.3 | -41.5 | -0.6 | -30.3 |
| Total other comprehensive loss | -1.8 | -0.2 | 0.0 | 0.0 | |
| Comprehensive loss | -125.1 | -97.4 | -41.6 | -0.6 | |