| Revenue | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 |
| Total Revenue | 7,253,000 | 7,379,000 | 6,680,000 | 6,085,000 |
| Cost of Revenue | 3,999,000 | 4,056,000 | 3,624,000 | 3,605,000 |
| Gross Profit | 3,254,000 | 3,323,000 | 3,056,000 | 2,480,000 |
| Operating Expenses |
| Research Development | 153,000 | 143,000 | 134,000 | 126,000 |
| Selling General and Administrative | 269,000 | 265,000 | 258,000 | 241,000 |
| Non Recurring | - | - | - | - |
| Others | - | - | - | - |
| Total Operating Expenses | 6,102,000 | 5,827,000 | 5,246,000 | 5,114,000 |
| Operating Income or Loss | 1,151,000 | 1,552,000 | 1,434,000 | 971,000 |
| Income from Continuing Operations |
| Total Other Income/Expenses Net | -446,000 | -496,000 | -1,667,000 | -721,000 |
| Earnings Before Interest and Taxes | 1,151,000 | 1,552,000 | 1,434,000 | 971,000 |
| Interest Expense | -207,000 | -241,000 | -273,000 | -297,000 |
| Income Before Tax | 705,000 | 1,056,000 | -233,000 | 250,000 |
| Income Tax Expense | 386,000 | 1,127,000 | 579,000 | 391,000 |
| Minority Interest | 1,010,000 | 984,000 | 1,153,000 | 2,942,000 |
| Net Income From Continuing Ops | 319,000 | -71,000 | -812,000 | -141,000 |
| Non-recurring Events |
| Discontinued Operations | 61,000 | -38,000 | -403,000 | 221,000 |
| Extraordinary Items | - | - | - | - |
| Effect Of Accounting Changes | - | - | - | - |
| Other Items | - | - | - | - |
| Net Income |
| Net Income | 341,000 | -114,000 | -629,000 | 220,000 |
| Preferred Stock And Other Adjustments | - | - | - | - |
| Net Income Applicable To Common Shares | 341,000 | -114,000 | -629,000 | 220,000 |