| Revenue | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 |
| Total Revenue | 13,403,000 | 11,652,000 | 9,318,000 | 11,199,000 |
| Cost of Revenue | 10,081,000 | 8,985,000 | 7,872,000 | 8,949,000 |
| Gross Profit | 3,322,000 | 2,667,000 | 1,446,000 | 2,250,000 |
| Operating Expenses |
| Research Development | 31,000 | 32,000 | 33,000 | 69,000 |
| Selling General and Administrative | 387,000 | 365,000 | 312,000 | 341,000 |
| Non Recurring | - | - | - | - |
| Others | 125,000 | 18,000 | 7,000 | -2,000 |
| Total Operating Expenses | 11,357,000 | 10,150,000 | 9,014,000 | 10,137,000 |
| Operating Income or Loss | 2,046,000 | 1,502,000 | 304,000 | 1,062,000 |
| Income from Continuing Operations |
| Total Other Income/Expenses Net | -449,000 | -343,000 | -466,000 | -1,399,000 |
| Earnings Before Interest and Taxes | 2,046,000 | 1,502,000 | 304,000 | 1,062,000 |
| Interest Expense | -122,000 | -104,000 | -243,000 | -270,000 |
| Income Before Tax | 1,597,000 | 1,159,000 | -162,000 | -337,000 |
| Income Tax Expense | 726,000 | 600,000 | 184,000 | 402,000 |
| Minority Interest | 2,005,000 | 2,275,000 | 2,043,000 | 2,071,000 |
| Net Income From Continuing Ops | 871,000 | 559,000 | -346,000 | -739,000 |
| Non-recurring Events |
| Discontinued Operations | - | - | - | - |
| Extraordinary Items | - | - | - | - |
| Effect Of Accounting Changes | - | - | - | - |
| Other Items | - | - | - | - |
| Net Income |
| Net Income | 227,000 | 217,000 | -400,000 | -863,000 |
| Preferred Stock And Other Adjustments | - | - | - | - |
| Net Income Applicable To Common Shares | 227,000 | 217,000 | -400,000 | -863,000 |