| Quarterly Key indicators | Q1/2022 | Q4/2021 | Q3/2021 | Q2/2021 | Q1/2021 |
| Net sales, M€ | 9.0 | 10.8 | 9.0 | 7.2 | 6.2 |
| Operating result before depreciation (EBITDA), M€ | 1.3 | 1.7 | 1.5 | 0.9 | -0.1 |
| Operating result (EBIT), M€ | 0.8 | 1.2 | 1.0 | 0.5 | -0.5 |
| of net sales, % | 9% | 12% | 12% | 6% | -8% |
| Profit/loss before taxes, M€ | 0.8 | 1.2 | 1.0 | 0.4 | -0.5 |
| of net sales, % | 9% | 11% | 11% | 6% | -7% |
| Net profit/loss for the period, M€ | 0.8 | 1.1 | 1.0 | 0.4 | -0.5 |
| of net sales, % | 8% | 11% | 11% | 6% | -7% |
| Equity ratio, % | 67% | 61% | 63% | 64% | 63% |
| Gearing, % | 9% | 9% | 17% | 18% | 21% |
| Gross investments in fixed assets, M€ | 0.9 | 0.4 | 0.1 | 0.2 | 0.6 |
| of net sales, % | 10% | 4% | 1% | 2% | 10% |
| Personnel, end of the quarter | 140 | 145 | 140 | 140 | 134 |
| Earnings/share (EPS), € | 0.11 | 0.17 | 0.15 | 0.06 | -0.07 |
| Equity/share, € | 2.91 | 2.80 | 2.65 | 2.50 | 2.44 |