| Revenue | 12/31/2018 | 12/31/2017 | 12/31/2016 | 12/31/2015 |
| Total Revenue | 6,877,000 | 6,869,000 | 6,702,000 | 6,156,000 |
| Cost of Revenue | 5,589,000 | 5,536,000 | 5,392,000 | 5,024,000 |
| Gross Profit | 1,288,000 | 1,333,000 | 1,310,000 | 1,132,000 |
| Operating Expenses |
| Research Development | 70,000 | 60,000 | 65,000 | 64,000 |
| Selling General and Administrative | 557,000 | 702,000 | 601,000 | 476,000 |
| Non Recurring | - | - | - | - |
| Others | -1,000 | 28,000 | 18,000 | 19,000 |
| Total Operating Expenses | 6,215,000 | 6,326,000 | 6,076,000 | 5,583,000 |
| Operating Income or Loss | 662,000 | 543,000 | 626,000 | 573,000 |
| Income from Continuing Operations |
| Total Other Income/Expenses Net | -385,000 | -268,000 | -270,000 | -305,000 |
| Earnings Before Interest and Taxes | 662,000 | 543,000 | 626,000 | 573,000 |
| Interest Expense | -250,000 | -250,000 | -263,000 | -209,000 |
| Income Before Tax | 277,000 | 275,000 | 356,000 | 268,000 |
| Income Tax Expense | 108,000 | 70,000 | 119,000 | 106,000 |
| Minority Interest | 114,000 | 119,000 | 109,000 | 108,000 |
| Net Income From Continuing Ops | 169,000 | 205,000 | 237,000 | 162,000 |
| Non-recurring Events |
| Discontinued Operations | 113,000 | -3,000 | -7,000 | -4,000 |
| Extraordinary Items | - | - | - | - |
| Effect Of Accounting Changes | - | - | - | - |
| Other Items | - | - | - | - |
| Net Income |
| Net Income | 257,000 | 180,000 | 209,000 | 135,000 |
| Preferred Stock And Other Adjustments | - | - | - | - |
| Net Income Applicable To Common Shares | 257,000 | 180,000 | 209,000 | 135,000 |