| Revenue | 29/12/2018 | 30/12/2017 | 31/12/2016 | 26/12/2015 |
| Total revenue | 70,848,000 | 62,761,000 | 59,387,000 | 55,355,000 |
| Cost of revenue | 27,111,000 | 23,608,000 | 22,767,000 | 20,676,000 |
| Gross profit | 43,737,000 | 39,153,000 | 36,620,000 | 34,679,000 |
| Operating expenses |
| Research development | 13,543,000 | 13,035,000 | 12,685,000 | 12,128,000 |
| Selling general and administrative | 6,750,000 | 7,566,000 | 8,636,000 | 7,930,000 |
| Non-recurring | - | - | - | - |
| Others | -72,000 | -72,000 | -72,000 | -72,000 |
| Total operating expenses | 47,604,000 | 44,386,000 | 44,382,000 | 40,999,000 |
| Operating income or loss | 23,244,000 | 18,375,000 | 15,005,000 | 14,356,000 |
| Income from continuing operations |
| Total other income/expenses net | 73,000 | 1,977,000 | -2,069,000 | -144,000 |
| Earnings before interest and taxes | 23,244,000 | 18,375,000 | 15,005,000 | 14,356,000 |
| Interest expense | -459,000 | -637,000 | -725,000 | -345,000 |
| Income before tax | 23,317,000 | 20,352,000 | 12,936,000 | 14,212,000 |
| Income tax expense | 2,264,000 | 10,751,000 | 2,620,000 | 2,792,000 |
| Minority interest | - | - | - | - |
| Net income from continuing ops | 21,053,000 | 9,601,000 | 10,316,000 | 11,420,000 |
| Non-recurring events |
| Discontinued operations | - | - | - | - |
| Extraordinary items | - | - | - | - |
| Effect of accounting changes | - | - | - | - |
| Other items | - | - | - | - |
| Net income |
| Net income | 21,053,000 | 9,601,000 | 10,316,000 | 11,420,000 |
| Preferred stock and other adjustments | - | - | - | - |
| Net income applicable to common shares | 21,053,000 | 9,601,000 | 10,316,000 | 11,420,000 |