| Revenue | 31/12/2018 | 31/12/2017 | 31/12/2016 | 31/12/2015 |
| Total revenue | 30,821,000 | 30,186,000 | 27,889,000 | 23,923,000 |
| Cost of revenue | 9,714,000 | 9,317,000 | 8,907,000 | 8,853,000 |
| Gross profit | 21,107,000 | 20,869,000 | 18,982,000 | 15,070,000 |
| Operating expenses |
| Research development | 3,798,000 | 3,925,000 | 3,550,000 | 3,560,000 |
| Selling general and administrative | 9,366,000 | 9,256,000 | 8,852,000 | 9,232,000 |
| Non-recurring | - | - | - | - |
| Others | 309,000 | 799,000 | 1,292,000 | -269,000 |
| Total operating expenses | 23,187,000 | 23,297,000 | 22,601,000 | 21,376,000 |
| Operating income or loss | 7,634,000 | 6,889,000 | 5,288,000 | 2,547,000 |
| Income from continuing operations |
| Total other income/expenses net | -2,834,000 | -3,364,000 | -3,349,000 | 7,979,000 |
| Earnings before interest and taxes | 7,634,000 | 6,889,000 | 5,288,000 | 2,547,000 |
| Interest expense | -754,000 | -720,000 | -701,000 | -719,000 |
| Income before tax | 4,800,000 | 3,525,000 | 1,939,000 | 10,526,000 |
| Income tax expense | 754,000 | 1,356,000 | 877,000 | 2,154,000 |
| Minority interest | -688,000 | 3,557,000 | 3,839,000 | 3,764,000 |
| Net income from continuing ops | 4,046,000 | 2,169,000 | 1,062,000 | 8,372,000 |
| Non-recurring events |
| Discontinued operations | - | - | - | - |
| Extraordinary items | - | - | - | - |
| Effect of accounting changes | - | - | - | - |
| Other items | - | - | - | - |
| Net income |
| Net income | 3,623,000 | 1,532,000 | 912,000 | 8,422,000 |
| Preferred stock and other adjustments | - | - | - | - |
| Net income applicable to common shares | 3,623,000 | 1,532,000 | 912,000 | 8,422,000 |