| Revenue | 31/12/2018 | 31/12/2017 | 31/12/2016 | 31/12/2015 |
| Total revenue | 79,591,000 | 79,139,000 | 79,919,000 | 81,741,000 |
| Cost of revenue | 42,655,000 | 42,196,000 | 41,402,000 | 41,057,000 |
| Gross profit | 36,936,000 | 36,943,000 | 38,517,000 | 40,684,000 |
| Operating expenses |
| Research development | 5,379,000 | 5,590,000 | 5,726,000 | 5,247,000 |
| Selling general and administrative | 20,325,000 | 20,900,000 | 20,225,000 | 19,589,000 |
| Non-recurring | - | - | - | - |
| Others | -998,000 | -1,445,000 | -1,604,000 | -669,000 |
| Total operating expenses | 67,361,000 | 67,241,000 | 65,749,000 | 65,224,000 |
| Operating income or loss | 12,230,000 | 11,898,000 | 14,170,000 | 16,517,000 |
| Income from continuing operations |
| Total other income/expenses net | -888,000 | -498,000 | -1,840,000 | -572,000 |
| Earnings before interest and taxes | 12,230,000 | 11,898,000 | 14,170,000 | 16,517,000 |
| Interest expense | -723,000 | -615,000 | -630,000 | -468,000 |
| Income before tax | 11,342,000 | 11,400,000 | 12,330,000 | 15,945,000 |
| Income tax expense | 2,619,000 | 5,642,000 | 449,000 | 2,581,000 |
| Minority interest | 134,000 | 131,000 | 146,000 | 162,000 |
| Net income from continuing ops | 8,723,000 | 5,758,000 | 11,881,000 | 13,364,000 |
| Non-recurring events |
| Discontinued operations | 5,000 | -5,000 | -9,000 | -174,000 |
| Extraordinary items | - | - | - | - |
| Effect of accounting changes | - | - | - | - |
| Other items | - | - | - | - |
| Net income |
| Net income | 8,728,000 | 5,753,000 | 11,872,000 | 13,190,000 |
| Preferred stock and other adjustments | - | - | - | - |
| Net income applicable to common shares | 8,728,000 | 5,753,000 | 11,872,000 | 13,190,000 |