| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 |
| | 10-K | 10-K | 10-K | 10-K |
| Revenue | 101.3 | 74.0 | 32.9 | 24.0 |
| Revenue growth | 36.9% | 124.8% | 37.4% | |
| Cost of revenue | 186.2 | 194.7 | | |
| |
| Operating expenses: | | | | |
| Research and development | 70.3 | 93.5 | 68.8 | 74.9 |
| Selling, general, and administrative | 159.7 | 131.2 | 74.0 | 73.5 |
| |
| Impairment of note receivable | | | | |
| Total operating expenses | 442.3 | 419.4 | 263.4 | 329.6 |
| Loss from operations | -340.9 | -345.4 | -230.5 | -305.7 |
| Operating margin | -336.5% | -466.7% | -700.0% | -1276.0% |
| |
| Interest and other expense (income), net: | | | | |
| Interest expense, net | 2.9 | 5.9 | 45.5 | 6.4 |
| Other expense (income), net | 0.4 | 6.4 | 0.0 | 0.1 |
| Gain on fair value change, net | -7.3 | -24.3 | | |
| Interest and other expense (income), net | -4.0 | 4.3 | | |
| Loss before provision for income taxes | -336.9 | -343.4 | -249.7 | -312.1 |
| Provision for income taxes | 0.1 | -0.4 | 0.0 | 0.1 |
| Net loss | -337.1 | -343.0 | -249.7 | -312.1 |
| Comprehensive loss | -337.1 | -343.0 | -249.7 | -312.1 |
| |
| Net loss per share, basic (in shares) | ($1.56) | ($1.97) | ($148.81) | ($198.66) |
| Net loss per share, diluted (in shares) | ($1.56) | ($1.97) | ($148.81) | ($198.66) |
| |
| Weighted-average shares used in calculation of net loss per share, diluted | 215.6 | 173.7 | 1.7 | 1.6 |
| Weighted-average shares used in calculation of net loss per share, basic | 215.6 | 173.7 | 1.7 | 1.6 |