| Revenue | 12/31/2018 | 12/31/2017 | 12/31/2016 | 12/31/2015 |
| Total Revenue | 44,541,000 | 42,207,000 | 40,180,000 | 40,990,000 |
| Cost of Revenue | 32,651,000 | 29,452,000 | 26,814,000 | 26,603,000 |
| Gross Profit | 11,890,000 | 12,755,000 | 13,366,000 | 14,387,000 |
| 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 | 4,806,000 | 4,525,000 | 4,374,000 |
| Total Operating Expenses | 41,098,000 | 37,437,000 | 34,187,000 | 33,735,000 |
| Operating Income or Loss | 3,443,000 | 4,770,000 | 5,993,000 | 7,255,000 |
| Income from Continuing Operations |
| Total Other Income/Expenses Net | -1,559,000 | -1,686,000 | -1,694,000 | -2,639,000 |
| Earnings Before Interest and Taxes | 3,443,000 | 4,770,000 | 5,993,000 | 7,255,000 |
| Interest Expense | -1,056,000 | -1,053,000 | -991,000 | -880,000 |
| Income Before Tax | 1,884,000 | 3,084,000 | 4,299,000 | 4,616,000 |
| Income Tax Expense | 472,000 | 1,165,000 | 1,623,000 | -2,994,000 |
| Minority Interest | - | - | - | - |
| Net Income From Continuing Ops | 1,412,000 | 1,919,000 | 2,676,000 | 7,610,000 |
| Non-recurring Events |
| Discontinued Operations | - | - | - | - |
| Extraordinary Items | - | - | - | - |
| Effect Of Accounting Changes | - | - | - | - |
| Other Items | - | - | - | - |
| Net Income |
| Net Income | 1,412,000 | 1,919,000 | 2,676,000 | 7,610,000 |
| Preferred Stock And Other Adjustments | - | - | - | - |
| Net Income Applicable To Common Shares | 1,412,000 | 1,919,000 | 2,676,000 | 7,610,000 |