| x € 1,000 | 2016 | 2015 | 2014 | 2013 | 2012 |
| Net revenue | 162,374 | 113,437 | 91,598 | 110,064 | 119,997 |
| Material usage | 77,226 | 56,605 | 49,170 | 60,443 | 71,302 |
| Gross margin | 85,148 | 56,832 | 42,428 | 49,621 | 48,695 |
| Operating costs | 77,778 | 51,734 | 36,204 | 42,663 | 41,624 |
| Operating income | 8,171 | 7,830 | 6,224 | 6,958 | 7,071 |
| Interest income and expenses | -1,269 | -148 | -420 | -521 | -527 |
| Profit from normal business operations before taxes | 6,902 | 7,682 | 5,804 | 6,437 | 6,544 |
| Taxes | 1,031 | 1,040 | 1,234 | 1,244 | 1,152 |
| Profit discontinued activities | 4,690 | 3,304 | |||
| Net profit | 5,882 | 11,566 | 7,881 | 5,193 | 5,392 |
| Net profit attributable to | |||||
| Shareholders | 5,882 | 10,784 | 6,873 | 4,178 | 4,695 |
| Minority interest | 782 | 1,008 | 1,015 | 697 |
| x € 1,000 | 2016 | 2015 | 2014 | 2013 | 2012 |
| Assets | |||||
| Fixed assets | 62,822 | 62,522 | 42,585 | 43,684 | 41,537 |
| Current assets | 53,727 | 49,411 | 23,633 | 35,685 | 34,049 |
| Cash and cash equivalents | 1,914 | 8,245 | 11,507 | 4,626 | 9,986 |
| Total | 118,463 | 120,178 | 77,725 | 83,995 | 85,572 |
| Liabilities | |||||
| Shareholders’ equity | 48,390 | 42,791 | 35,828 | 30,420 | 28,403 |
| Minority interests | 2,452 | 2,087 | 2,039 | ||
| Group equity | 48,390 | 42,791 | 38,280 | 32,507 | 30,442 |
| Provisions and non-current debts | 20,586 | 22,645 | 8,921 | 9,971 | 13,019 |
| Current debts (excl. owed to banks) | 46,961 | 50,587 | 28,429 | 31,889 | 30,812 |
| Owed to banks | 2,526 | 4,155 | 2,095 | 9,628 | 11,299 |
| Total | 118,463 | 120,178 | 77,725 | 83,995 | 85,572 |
| 2016 | 2015 | 2014 | 2013 | 2012 | |
| Operating profit as % of revenu | 5.0% | 6.9% | 6.8% | 6.3% | 5.9% |
| Return on invested capital | 9.5% | 5.3% | 11.9% | 9.9% | 11.7% |
| Return on shareholders’ equity | 11.7% | 7.9% | 12.3% | 14.2% | 17.7% |
| Solvency | 40.8% | 35.6% | 49.3% | 38.7% | 35.6% |
| x € 1,000 | 2016 | 2015 | 2014 | 2013 | 2012 |
| Cash flow form operating activities | 5,760 | 7,550 | 9,383 | 4,207 | 9,814 |
| Cash flow from investing activities | -8,085 | -3,743 | 7,867 | -5,489 | -4,451 |
| Cash flow form financing activities | -524 | -9,405 | -3,718 | -2,255 | -1,687 |
| Net cash flow | -2,849 | -5,648 | 13,532 | -3,537 | 3,676 |
| 2016 | 2015 | 2014 | 2013 | 2012 | |
| Average number of employees | 788 | 519 | 366 | 469 | 474 |
| Net revenue per employee (x € 1,000) | 206.1 | 218.6 | 271.8 | 234.7 | 253.2 |
| Salary costs per employee (x € 1,000) | 56.3 | 57.0 | 57.1 | 51.7 | 49.1 |
| x € 1 | 2016 | 2015 | 2014 | 2013 | 2012 |
| Operating profit continued operations | 6.55 | 6.41 | 5.09 | 5.26 | 5.79 |
| Shareholders’s equity | 38.81 | 35.01 | 29.32 | 24.89 | 23.24 |
| Profit per share | 4.72 | 8.82 | 5.62 | 3.42 | 3.84 |
| Profit per share continued operations | 4.72 | 5.21 | 2.91 | 3.42 | 3.84 |
| Dividend | 1.70 | 1.37 | 1.37 | 1.37 | 1.55 |