| 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 | 121.9 | 116.5 | | 124.9 | 120.5 | 98.9 | 127.0 | 117.6 |
| Net sales growth | 1.2% | 17.7% | | 6.2% | 8.1% | -1.2% | 20.9% | 2.8% |
| Cost of sales | 94.9 | 93.0 | | 100.8 | 102.2 | 82.2 | 117.3 | 106.3 |
| Gross profit | 27.0 | 23.5 | | 24.1 | 18.3 | 16.7 | 9.7 | 11.3 |
| Gross margin | 22.1% | 20.2% | | 19.3% | 15.2% | 16.9% | 7.6% | 9.6% |
| |
| Operating expenses: | | | | | | | | |
| Research, development and engineering expenses | 4.7 | 4.6 | | 4.8 | 4.6 | 4.6 | 4.7 | 5.4 |
| Selling, general and administrative expenses | 10.6 | 9.9 | | 11.5 | 10.0 | 11.4 | 10.0 | 11.0 |
| Amortization of intangible assets | 0.4 | 0.4 | | 0.5 | 0.5 | 0.5 | 0.6 | 0.6 |
| Total operating expenses | 15.6 | 14.9 | | 16.9 | 15.1 | 16.5 | 15.3 | 17.0 |
| Operating income | 11.3 | 8.5 | | 7.2 | 3.2 | 0.2 | -5.6 | -5.7 |
| Operating margin | 9.3% | 7.3% | | 5.8% | 2.7% | 0.2% | -4.4% | -4.8% |
| Interest expense | -4.6 | -4.7 | | -3.6 | -2.7 | -2.4 | -2.1 | -1.6 |
| Income (Loss) before income taxes | 6.7 | 3.9 | | 3.6 | 0.6 | -2.2 | -7.7 | -7.3 |
| Income tax expense (benefit) | 0.2 | 0.1 | | 0.4 | -0.8 | 0.4 | -0.1 | -0.1 |
| Net income (loss) | 6.4 | 3.7 | | 3.2 | 1.4 | -2.6 | -7.6 | -7.2 |
| |
| Weighted-average common shares outstanding: | | | | | | | | |
| Basic (in shares) | 23.0 | 23.0 | | 22.9 | 22.9 | 22.9 | 22.9 | 22.9 |
| Diluted (in shares) | 23.0 | 23.0 | | 23.0 | 22.9 | 22.9 | 22.9 | 22.9 |
| |
| Earnings (Loss) per common share: | | | | | | | | |
| Basic (in dollars per share) | $0.28 | $0.16 | | $0.14 | $0.06 | ($0.11) | ($0.33) | ($0.31) |
| Diluted (in dollars per share) | $0.28 | $0.16 | | $0.14 | $0.06 | ($0.11) | ($0.33) | ($0.31) |