| Revenue | 12/31/2018 | 12/31/2017 | 12/31/2016 | 12/31/2015 |
| Total Revenue | 22,832,000 | 21,240,000 | 19,941,000 | 21,813,000 |
| Cost of Revenue | 11,077,000 | 10,064,000 | 9,663,000 | 10,825,000 |
| Gross Profit | 11,755,000 | 11,176,000 | 10,278,000 | 10,988,000 |
| Operating Expenses |
| Research Development | - | - | - | - |
| Selling General and Administrative | -13,000 | -24,000 | -29,000 | -29,000 |
| Non Recurring | - | - | - | - |
| Others | 1,022,000 | 948,000 | 997,000 | 924,000 |
| Total Operating Expenses | 14,277,000 | 13,093,000 | 12,669,000 | 13,761,000 |
| Operating Income or Loss | 8,555,000 | 8,147,000 | 7,272,000 | 8,052,000 |
| Income from Continuing Operations |
| Total Other Income/Expenses Net | -814,000 | -515,000 | -506,000 | -396,000 |
| Earnings Before Interest and Taxes | 8,555,000 | 8,147,000 | 7,272,000 | 8,052,000 |
| Interest Expense | -870,000 | -719,000 | -698,000 | -622,000 |
| Income Before Tax | 7,741,000 | 7,632,000 | 6,766,000 | 7,656,000 |
| Income Tax Expense | 1,775,000 | -3,080,000 | 2,533,000 | 2,884,000 |
| Minority Interest | - | - | - | - |
| Net Income From Continuing Ops | 5,966,000 | 10,712,000 | 4,233,000 | 4,772,000 |
| Non-recurring Events |
| Discontinued Operations | - | - | - | - |
| Extraordinary Items | - | - | - | - |
| Effect Of Accounting Changes | - | - | - | - |
| Other Items | - | - | - | - |
| Net Income |
| Net Income | 5,966,000 | 10,712,000 | 4,233,000 | 4,772,000 |
| Preferred Stock And Other Adjustments | - | - | - | - |
| Net Income Applicable To Common Shares | 5,966,000 | 10,712,000 | 4,233,000 | 4,772,000 |