| Revenue | 12/31/2018 | 12/31/2017 | 12/31/2016 | 12/31/2015 |
| Total Revenue | 33,530,000 | 33,886,000 | 29,471,000 | 27,626,000 |
| Cost of Revenue | 23,696,000 | 23,395,000 | 19,958,000 | 19,092,000 |
| Gross Profit | 9,834,000 | 10,491,000 | 9,513,000 | 8,534,000 |
| Operating Expenses |
| Research Development | 666,000 | 558,000 | 502,000 | 464,000 |
| Selling General and Administrative | 4,873,000 | 5,554,000 | 4,742,000 | 4,195,000 |
| Non Recurring | - | - | - | - |
| Others | -40,000 | -138,000 | -138,000 | -138,000 |
| Total Operating Expenses | 29,195,000 | 29,369,000 | 25,202,000 | 23,751,000 |
| Operating Income or Loss | 4,335,000 | 4,517,000 | 4,269,000 | 3,875,000 |
| Income from Continuing Operations |
| Total Other Income/Expenses Net | 329,000 | -595,000 | -549,000 | -613,000 |
| Earnings Before Interest and Taxes | 4,335,000 | 4,517,000 | 4,269,000 | 3,875,000 |
| Interest Expense | -942,000 | -874,000 | -678,000 | -868,000 |
| Income Before Tax | 4,664,000 | 3,922,000 | 3,720,000 | 3,262,000 |
| Income Tax Expense | 950,000 | 889,000 | 1,044,000 | 965,000 |
| Minority Interest | 9,597,000 | 8,059,000 | 8,185,000 | 8,015,000 |
| Net Income From Continuing Ops | 3,714,000 | 3,033,000 | 2,676,000 | 2,297,000 |
| Non-recurring Events |
| Discontinued Operations | - | - | - | - |
| Extraordinary Items | - | - | - | - |
| Effect Of Accounting Changes | - | - | - | - |
| Other Items | - | - | - | - |
| Net Income |
| Net Income | 2,027,000 | 1,814,000 | 1,560,000 | 1,358,000 |
| Preferred Stock And Other Adjustments | - | - | - | - |
| Net Income Applicable To Common Shares | 2,027,000 | 1,814,000 | 1,560,000 | 1,358,000 |