| In millions, except per share items | Jun-30-23 | Dec-31-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 | Mar-31-21 |
| | 10-Q | 8-K | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q |
| Revenue | | | | | | | | |
| Total revenue, net | | | 87.9 | 66.3 | 45.6 | 72.2 | 57.6 | 62.1 |
| Total revenue, net growth | | | 52.6% | 6.8% | -25.5% | 195.0% | 35.6% | 45.9% |
| Operating expenses | | | | | | | | |
| Cost of sales | | | 2.6 | 1.3 | 1.1 | 0.6 | 0.4 | 0.0 |
| Selling, general and administrative | | | 187.2 | 180.0 | 174.6 | 168.3 | 154.9 | 110.6 |
| Research and development | | | 55.4 | 53.9 | 51.1 | 53.2 | 45.3 | 35.2 |
| Other (income) expense, net | | | 0.7 | 0.2 | 0.6 | 6.6 | 5.6 | 6.3 |
| Total cost of sales and operating expenses | | | 244.8 | 234.4 | 226.3 | 228.3 | 205.6 | 151.9 |
| Loss from operations | | | -156.9 | -168.1 | -180.7 | -156.1 | -148.0 | -100.9 |
| Operating margin | | | -178.6% | -253.4% | -396.3% | -216.1% | -257.1% | -162.6% |
| Interest income | | | 1.0 | 0.6 | 0.5 | 0.6 | 0.6 | 0.5 |
| Net loss before income taxes | | | -156.0 | -167.5 | -180.2 | -155.5 | -147.4 | -100.4 |
| Income tax (benefit) expense | | | 0.8 | 0.8 | 0.8 | 0.2 | 0.2 | 0.2 |
| Net loss | | | -156.7 | -168.2 | -181.0 | -155.7 | -147.6 | -100.6 |
| |
| Other comprehensive loss: | | | | | | | | |
| Unrealized (loss) gain on available-for-sale securities, net of tax of nil | | | -1.1 | -0.8 | 0.0 | 0.0 | 0.0 | 0.0 |
| Comprehensive loss | | | -157.8 | -169.0 | -181.0 | -155.7 | -147.6 | -100.6 |
| |
| Basic loss per share (in usd per share) | | | ($1.16) | ($1.28) | ($1.41) | ($1.21) | ($1.16) | ($1.05) |
| Diluted loss per share (in usd per share) | | | ($1.16) | ($1.28) | ($1.41) | ($1.21) | ($1.16) | ($1.05) |
| |
| Weighted-average common shares outstanding used in computation of basic loss per share | | | 135.3 | 131.9 | 128.4 | 125.6 | 124.1 | 92.1 |
| Weighted-average common shares outstanding used in computation of diluted loss per share | | | 135.3 | 131.9 | 128.4 | 125.6 | 124.1 | 120.2 |