| In millions, except per share items | Jun-30-23 | Mar-31-23 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Sep-30-21 | Jun-30-21 | Mar-31-21 |
| | 10-Q | 10-Q | 10-Q | 10-Q | 10-Q | 10-Q | 10-Q | 10-Q |
| Revenue | | | | | | | | |
| Total revenue | 0.2 | 8.8 | 6.1 | 5.9 | 3.3 | 0.7 | 0.6 | 0.2 |
| Total revenue growth | -95.8% | 167.9% | 744.7% | 863.2% | 1911.0% | 1951.4% | | |
| Costs and expenses | | | | | | | | |
| Cost of goods sold | 11.2 | 26.9 | 50.0 | 36.9 | 35.6 | 12.9 | 12.4 | 0.1 |
| Research and development expenses | 5.0 | 5.4 | 4.5 | 5.5 | 5.0 | 5.1 | 3.6 | 5.1 |
| Selling, general and administrative expenses | 13.1 | 14.0 | 14.7 | 19.1 | 14.3 | 8.8 | 11.3 | 8.8 |
| Loss from write-down of property, plant and equipment | 5.4 | 0.8 | 0.5 | 2.0 | 0.0 | | | |
| Grant (income) expense, net | | | | -0.2 | | | | |
| Total costs and expenses | 34.8 | 47.1 | 69.6 | 126.7 | 55.0 | 27.0 | 49.8 | 21.8 |
| Operating loss | -34.6 | -38.3 | -63.6 | -57.4 | -51.7 | -26.3 | -49.2 | -21.7 |
| Operating margin | -13894.4% | -433.1% | -1048.1% | -973.3% | -1567.7% | -3661.0% | -8037.3% | -13201.8% |
| |
| Other (expense) income | | | | | | | | |
| Interest expense, net | | | | | | | | |
| Loss on debt extinguishment | -1.9 | -1.6 | | | | 1.3 | 22.5 | 7.9 |
| Other expense | -0.9 | 0.0 | 0.0 | -0.6 | 0.1 | | | |
| Loss before income taxes | -131.6 | -71.6 | -70.6 | -56.7 | -45.8 | -18.1 | -54.0 | -21.5 |
| Income tax expense (benefit) | 0.0 | 0.0 | 0.1 | 0.0 | 0.0 | | | |
| Net loss | -131.6 | -71.6 | -70.7 | -56.7 | -45.8 | -18.1 | -54.0 | -21.5 |
| |
| Other comprehensive income | | | | | | | | |
| Foreign currency translation adjustment, net of tax | 0.0 | 0.0 | 0.0 | 0.0 | | | | |
| Comprehensive loss | -131.6 | -71.6 | -70.7 | -56.7 | -45.8 | -18.1 | -54.0 | |
| |
| Basic and diluted loss per share attributable to common shareholders | | | | | | | | |
| Basic (in dollars per share) | ($1.12) | ($0.82) | ($1.12) | ($1.01) | ($0.85) | ($0.34) | ($1.04) | ($0.42) |
| Diluted (in dollars per share) | ($1.12) | ($0.82) | ($1.12) | ($1.01) | ($0.85) | ($0.34) | ($1.04) | ($0.42) |
| |
| Weighted average shares of common stock | | | | | | | | |
| Basic (in shares) | 117.3 | 86.8 | 63.1 | 56.0 | 54.0 | 53.6 | 51.8 | 51.1 |
| Diluted (in shares) | 117.3 | 86.8 | 63.1 | 56.0 | 54.0 | 53.6 | 51.8 | 51.1 |