| Revenue | 12/31/2018 | 12/31/2017 | 12/31/2016 | 12/31/2015 |
| Total Revenue | 44,541,000 | 42,622,000 | 40,142,000 | 40,990,000 |
| Cost of Revenue | 32,337,000 | 29,430,000 | 26,800,000 | 26,574,000 |
| Gross Profit | 12,204,000 | 13,192,000 | 13,342,000 | 14,416,000 |
| Operating Expenses |
| Research Development | - | - | - | - |
| Selling General and Administrative | 1,520,000 | 1,477,000 | 1,323,000 | 1,394,000 |
| Non Recurring | - | - | - | - |
| Others | 5,088,000 | 4,910,000 | 4,634,000 | 4,374,000 |
| Total Operating Expenses | 40,784,000 | 37,519,000 | 34,282,000 | 33,706,000 |
| Operating Income or Loss | 3,757,000 | 5,103,000 | 5,860,000 | 7,284,000 |
| Income from Continuing Operations |
| Total Other Income/Expenses Net | -1,873,000 | -1,708,000 | -1,708,000 | -2,668,000 |
| Earnings Before Interest and Taxes | 3,757,000 | 5,103,000 | 5,860,000 | 7,284,000 |
| Interest Expense | -1,056,000 | -1,053,000 | -991,000 | -880,000 |
| Income Before Tax | 1,884,000 | 3,395,000 | 4,152,000 | 4,616,000 |
| Income Tax Expense | 472,000 | 2,113,000 | 1,568,000 | -2,994,000 |
| Minority Interest | - | - | - | - |
| Net Income From Continuing Ops | 1,412,000 | 1,282,000 | 2,584,000 | 7,610,000 |
| Non-recurring Events |
| Discontinued Operations | - | - | - | - |
| Extraordinary Items | - | - | - | - |
| Effect Of Accounting Changes | - | - | - | - |
| Other Items | - | - | - | - |
| Net Income |
| Net Income | 1,412,000 | 1,282,000 | 2,584,000 | 7,610,000 |
| Preferred Stock And Other Adjustments | - | - | - | - |
| Net Income Applicable To Common Shares | 1,412,000 | 1,282,000 | 2,584,000 | 7,610,000 |