| In millions, except per share items | Jun-30-23 | Mar-31-23 | 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-K | 10-Q | 10-Q |
| Revenue | | | | | | | | |
| Revenue | | | | | | | | |
| Collaboration revenue | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 |
| Total revenue | 20.5 | 20.4 | 14.1 | 23.0 | 23.0 | 20.0 | 19.8 | 18.9 |
| Total revenue growth | 44.7% | -11.3% | -28.5% | 21.8% | -18.5% | 40.5% | | |
| Operating expenses | | | | | | | | |
| Cost of revenue | | | | | | | | |
| Research and development | 10.8 | | 17.6 | 13.8 | 11.2 | 15.6 | 8.6 | 8.1 |
| Selling, general and administrative | 29.6 | 34.2 | 36.8 | 30.8 | 29.7 | 20.6 | 14.8 | 12.8 |
| Total operating expenses | 51.6 | 34.2 | 61.5 | 56.3 | 51.4 | 45.0 | 31.4 | 27.2 |
| Loss from operations | -31.1 | -40.2 | -47.4 | -33.3 | -28.4 | -25.0 | -11.6 | -8.3 |
| Operating margin | -151.9% | -197.2% | -335.0% | -144.9% | -123.3% | -125.1% | -58.8% | -44.1% |
| |
| Other income | | | | | | | | |
| Interest income and other, net | 5.8 | | 0.8 | 0.2 | 0.1 | 0.1 | 0.1 | 0.0 |
| Change in fair value of warrant liabilities | 0.5 | | 14.5 | 12.6 | 1.2 | -8.1 | | |
| Change in fair value of earn-out liability | | | 9.0 | | | | | |
| Total other income | 6.3 | 4.9 | 24.4 | 29.3 | 5.1 | -16.4 | -1.7 | -1.2 |
| Net loss before income tax provision | -24.8 | | -23.0 | | | | | |
| Income tax provision | 0.0 | | 0.0 | | | | | |
| Net loss | -24.8 | | -23.0 | -4.0 | -23.3 | -41.4 | -13.3 | -9.5 |
| |
| Other comprehensive income (loss) | | | | | | | | |
| Net unrealized gain (loss) on available-for-sale securities | 0.2 | 0.4 | -0.2 | | | | 0.0 | |
| Foreign currency translation gain (loss) | 0.0 | | 0.0 | 0.0 | 0.0 | 0.0 | | 0.0 |
| Total other comprehensive income (loss) | 0.2 | | -0.2 | -0.7 | -0.1 | 0.0 | 0.0 | 0.0 |
| Comprehensive loss | -24.6 | | -23.2 | -4.6 | -23.4 | -41.4 | -13.3 | -9.5 |
| |
| Net loss per share, basic (in usd per share) | ($0.13) | ($0.18) | ($0.13) | ($0.02) | $0.37 | ($0.30) | ($0.12) | ($0.08) |
| Net loss per share, diluted (in usd per share) | ($0.13) | ($0.18) | ($0.13) | ($0.02) | $0.37 | ($0.30) | ($0.12) | ($0.08) |
| |
| Weighted-average shares outstanding used to compute net loss per share, basic | 186.7 | 186,524.5 | 183.1 | 182.1 | 137.2 | 137.2 | 114.9 | 114.5 |
| Weighted-average shares outstanding used to compute net loss per share, diluted | 186.7 | 186,524.5 | 183.1 | 182.1 | 137.2 | 137.2 | 114.9 | 114.5 |