| In millions, except per share items | Jun-30-23 | Mar-31-23 | Dec-31-22 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 |
| | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q |
| Revenues | 239.5 | 202.3 | 122.6 | 247.8 | 221.5 | 189.0 | 143.3 | 217.4 |
| Revenues growth | 8.1% | 7.0% | -14.5% | 14.0% | -7.3% | -2.9% | -30.9% | -0.8% |
| Operating expenses | 178.6 | 155.3 | | | 169.4 | 147.9 | | |
| Gross margin | 60.9 | 47.0 | | | 52.1 | 41.1 | | |
| Gross margin | 25.4% | 23.2% | | | 23.5% | 21.8% | | |
| Selling, general and administrative expenses | 56.3 | 54.7 | | | 62.9 | 63.5 | | |
| Restructuring and other related charges, net | | | | | | 0.0 | | |
| Operating income (loss) | 4.6 | -7.7 | -757.4 | | -10.8 | -22.4 | -721.9 | |
| Operating margin | 1.9% | -3.8% | -617.9% | | -4.9% | -11.9% | -503.8% | |
| Interest expense, net | -16.7 | -16.7 | -85.1 | | -18.5 | -18.6 | -46.1 | |
| Other income, net | 0.0 | 0.6 | | | 3.3 | 3.2 | -3.1 | |
| Loss from continuing operations before income taxes | -13.7 | -23.9 | -146.8 | | -26.0 | -37.8 | -176.1 | |
| Provision for income taxes | -2.1 | -0.9 | -7.5 | 1.5 | -2.2 | -0.5 | -17.2 | 7.4 |
| Net loss from continuing operations | -15.8 | -24.7 | -73.2 | -22.9 | -28.2 | -38.3 | -41.9 | -91.2 |
| |
| Discontinued operations: | | | | | | | | |
| Net income from discontinued operations, net of income tax | | | 203.9 | 3.7 | 6.7 | 5.9 | -5.2 | -0.7 |
| Net Income (Loss) Attributable to Parent, Total | -15.8 | -24.7 | 147.0 | -22.9 | -21.6 | -32.5 | -43.1 | -91.2 |
| |
| Basic net loss per common share: | | | | | | | | |
| Loss from continuing operations, Basic (in USD per share) | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Income from discontinued operations, basic (in USD per share) | | | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| |
| Basic (in dollars per share) | ($3.61) | ($5.69) | $18.59 | ($0.53) | ($4.99) | ($8.61) | ($55.43) | ($2.94) |
| |
| Weighted-average number of shares outstanding: | | | | | | | | |
| Weighted-average number of basic shares outstanding (in shares) | 4.4 | 4.3 | 4.2 | 43.2 | 4.3 | 3.8 | 3.1 | 31.0 |