| 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 | 8-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q |
| Net sales | | | | 471.3 | 464.0 | 455.0 | 456.3 | 434.3 |
| Net sales growth | | | | 8.5% | 7.6% | 10.3% | 9.2% | -6.7% |
| Cost of sales | | | | 402.5 | 408.0 | 404.1 | 415.0 | 383.9 |
| Gross profit | | | | 68.8 | 56.0 | 50.9 | 41.3 | 50.4 |
| Gross margin | | | | 14.6% | 12.1% | 11.2% | 9.0% | 11.6% |
| |
| Operating expenses: | | | | | | | | |
| Research, development and engineering expenses | | | | 18.6 | 19.2 | 20.8 | 22.4 | 24.0 |
| Selling, general and administrative expenses | | | | 42.9 | 42.4 | 53.4 | 57.9 | 61.2 |
| Amortization of intangible assets | | | | 2.2 | 2.3 | 2.4 | 2.5 | 2.7 |
| Total operating expenses | | | | 63.8 | 63.9 | 76.7 | 82.8 | 87.9 |
| Operating income | | | | 5.1 | -7.9 | -25.7 | -41.6 | -37.5 |
| Operating margin | | | | 1.1% | -1.7% | -5.7% | -9.1% | -8.6% |
| Interest expense | | | | -10.8 | -8.8 | -7.6 | -7.3 | -6.8 |
| Income (Loss) before income taxes | | | | -5.7 | -16.7 | -33.3 | -48.9 | -44.2 |
| Income tax expense (benefit) | | | | -0.1 | -0.7 | -0.4 | -0.4 | -0.2 |
| Net income (loss) | | | | -5.6 | -16.0 | -32.9 | -48.5 | -44.0 |
| |
| Weighted-average common shares outstanding: | | | | | | | | |
| Basic (in shares) | | | | 22.9 | 22.9 | 22.9 | 22.9 | 22.9 |
| Diluted (in shares) | | | | 22.9 | 22.9 | 22.9 | 22.9 | 22.9 |
| |
| Earnings (Loss) per common share: | | | | | | | | |
| Basic (in dollars per share) | | | | ($0.24) | ($0.69) | ($1.43) | ($2.11) | ($1.91) |
| Diluted (in dollars per share) | | | | ($0.24) | ($0.69) | ($1.43) | ($2.11) | ($1.91) |