| Revenue | 12/31/2018 | 12/31/2017 | 12/31/2016 | 12/31/2015 |
| Total Revenue | 5,455,000 | 5,157,000 | 5,098,000 | 5,264,000 |
| Cost of Revenue | 4,303,000 | 4,131,000 | 4,035,000 | 4,147,000 |
| Gross Profit | 1,152,000 | 1,026,000 | 1,063,000 | 1,117,000 |
| Operating Expenses |
| Research Development | - | - | - | - |
| Selling General and Administrative | 425,000 | 459,000 | 430,000 | 398,000 |
| Non Recurring | - | - | - | - |
| Others | - | - | -2,000 | 13,000 |
| Total Operating Expenses | 5,036,000 | 4,911,000 | 4,811,000 | 4,917,000 |
| Operating Income or Loss | 419,000 | 246,000 | 287,000 | 347,000 |
| Income from Continuing Operations |
| Total Other Income/Expenses Net | -79,000 | -629,000 | -130,000 | -191,000 |
| Earnings Before Interest and Taxes | 419,000 | 246,000 | 287,000 | 347,000 |
| Interest Expense | -62,000 | -63,000 | -63,000 | -89,000 |
| Income Before Tax | 340,000 | -383,000 | 157,000 | 156,000 |
| Income Tax Expense | 57,000 | -125,000 | 29,000 | 14,000 |
| Minority Interest | - | - | - | - |
| Net Income From Continuing Ops | 283,000 | -258,000 | 128,000 | 142,000 |
| Non-recurring Events |
| Discontinued Operations | - | - | - | - |
| Extraordinary Items | - | - | - | - |
| Effect Of Accounting Changes | - | - | - | - |
| Other Items | - | - | - | - |
| Net Income |
| Net Income | 283,000 | -258,000 | 128,000 | 142,000 |
| Preferred Stock And Other Adjustments | - | - | - | - |
| Net Income Applicable To Common Shares | 283,000 | -258,000 | 128,000 | 142,000 |