| Revenue | 31/12/2018 | 31/12/2017 | 31/12/2016 | 31/12/2015 |
| Total revenue | 101,127,000 | 94,005,000 | 93,496,000 | 96,114,000 |
| Cost of revenue | 81,490,000 | 76,612,000 | 79,026,000 | 82,088,000 |
| Gross profit | 19,637,000 | 17,393,000 | 14,470,000 | 14,026,000 |
| Operating expenses |
| Research development | 3,269,000 | 3,179,000 | 3,391,000 | 3,331,000 |
| Selling general and administrative | 4,525,000 | 4,101,000 | 4,091,000 | 3,525,000 |
| Non-recurring | - | - | - | - |
| Others | - | - | - | - |
| Total operating expenses | 89,284,000 | 83,892,000 | 86,508,000 | 88,944,000 |
| Operating income or loss | 11,843,000 | 10,113,000 | 6,988,000 | 7,170,000 |
| Income from continuing operations |
| Total other income/expenses net | -239,000 | -6,000 | -1,205,000 | -15,000 |
| Earnings before interest and taxes | 11,843,000 | 10,113,000 | 6,988,000 | 7,170,000 |
| Interest expense | -475,000 | -360,000 | -306,000 | -275,000 |
| Income before tax | 11,604,000 | 10,107,000 | 5,783,000 | 7,155,000 |
| Income tax expense | 1,144,000 | 1,649,000 | 749,000 | 1,979,000 |
| Minority interest | 71,000 | 57,000 | 60,000 | 62,000 |
| Net income from continuing ops | 10,460,000 | 8,458,000 | 5,034,000 | 5,176,000 |
| Non-recurring events |
| Discontinued operations | - | - | - | - |
| Extraordinary items | - | - | - | - |
| Effect of accounting changes | - | - | - | - |
| Other items | - | - | - | - |
| Net income |
| Net income | 10,460,000 | 8,458,000 | 5,034,000 | 5,176,000 |
| Preferred stock and other adjustments | - | - | - | - |
| Net income applicable to common shares | 10,460,000 | 8,458,000 | 5,034,000 | 5,176,000 |