| Revenue | 12/31/2018 | 12/31/2017 | 12/31/2016 | 12/31/2015 |
| Total Revenue | 4,904,000 | 4,765,000 | 4,669,000 | 4,634,000 |
| Cost of Revenue | 1,298,000 | 1,248,000 | 1,272,000 | 1,143,000 |
| Gross Profit | 3,606,000 | 3,517,000 | 3,397,000 | 3,491,000 |
| Operating Expenses |
| Research Development | 246,000 | 223,000 | 230,000 | 222,000 |
| Selling General and Administrative | 2,391,000 | 2,409,000 | 2,255,000 | 2,524,000 |
| Non Recurring | - | - | - | - |
| Others | - | - | - | - |
| Total Operating Expenses | 3,935,000 | 3,880,000 | 3,757,000 | 3,889,000 |
| Operating Income or Loss | 969,000 | 885,000 | 912,000 | 745,000 |
| Income from Continuing Operations |
| Total Other Income/Expenses Net | -188,000 | -6,000 | 150,000 | -186,000 |
| Earnings Before Interest and Taxes | 969,000 | 885,000 | 912,000 | 745,000 |
| Interest Expense | -59,000 | -57,000 | -52,000 | -49,000 |
| Income Before Tax | 781,000 | 879,000 | 1,062,000 | 559,000 |
| Income Tax Expense | 118,000 | 112,000 | 278,000 | 149,000 |
| Minority Interest | - | - | - | - |
| Net Income From Continuing Ops | 663,000 | 767,000 | 784,000 | 410,000 |
| Non-recurring Events |
| Discontinued Operations | - | - | - | - |
| Extraordinary Items | - | - | - | - |
| Effect Of Accounting Changes | - | - | - | - |
| Other Items | - | - | - | - |
| Net Income |
| Net Income | 663,000 | 767,000 | 784,000 | 410,000 |
| Preferred Stock And Other Adjustments | - | - | - | - |
| Net Income Applicable To Common Shares | 663,000 | 767,000 | 784,000 | 410,000 |