| Revenue | 12/31/2018 | 12/31/2017 | 12/31/2016 | 12/31/2015 |
| Total Revenue | - | 8,848,000 | 8,659,000 | 8,502,000 |
| Cost of Revenue | 6,818,000 | 6,512,000 | 6,223,000 | 6,061,000 |
| Gross Profit | 2,306,000 | 2,336,000 | 2,436,000 | 2,441,000 |
| Operating Expenses |
| Research Development | - | - | - | - |
| Selling General and Administrative | - | 1,342,000 | 1,314,000 | 1,249,000 |
| Non Recurring | - | - | - | - |
| Others | - | - | - | - |
| Total Operating Expenses | - | 8,113,000 | 7,790,000 | 7,528,000 |
| Operating Income or Loss | - | 735,000 | 869,000 | 974,000 |
| Income from Continuing Operations |
| Total Other Income/Expenses Net | -61,000 | -524,000 | -590,000 | -592,000 |
| Earnings Before Interest and Taxes | - | 735,000 | 869,000 | 974,000 |
| Interest Expense | - | -482,000 | -505,000 | -496,000 |
| Income Before Tax | - | 211,000 | 279,000 | 382,000 |
| Income Tax Expense | - | -150,000 | 116,000 | 69,000 |
| Minority Interest | - | - | - | - |
| Net Income From Continuing Ops | - | 361,000 | 163,000 | 313,000 |
| Non-recurring Events |
| Discontinued Operations | - | - | - | - |
| Extraordinary Items | - | - | - | - |
| Effect Of Accounting Changes | - | - | - | - |
| Other Items | - | - | - | - |
| Net Income |
| Net Income | - | 361,000 | 163,000 | 313,000 |
| Preferred Stock And Other Adjustments | - | - | - | - |
| Net Income Applicable To Common Shares | - | 361,000 | 163,000 | 313,000 |