| Revenue | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 |
| Total Revenue | 26,997,000 | 29,334,000 | 28,573,000 | 19,274,000 |
| Cost of Revenue | 18,693,000 | 24,071,000 | 23,031,000 | 16,885,000 |
| Gross Profit | 8,304,000 | 5,263,000 | 5,542,000 | 2,389,000 |
| Operating Expenses |
| Research Development | - | - | - | - |
| Selling General and Administrative | 6,432,000 | 6,350,000 | 6,000,000 | 4,970,000 |
| Non Recurring | - | - | - | - |
| Others | -1,646,000 | -3,994,000 | -3,974,000 | -5,854,000 |
| Total Operating Expenses | 23,479,000 | 26,427,000 | 25,057,000 | 16,001,000 |
| Operating Income or Loss | 3,518,000 | 2,907,000 | 3,516,000 | 3,273,000 |
| Income from Continuing Operations |
| Total Other Income/Expenses Net | -305,000 | -363,000 | -316,000 | -389,000 |
| Earnings Before Interest and Taxes | 3,518,000 | 2,907,000 | 3,516,000 | 3,273,000 |
| Interest Expense | -305,000 | -303,000 | -316,000 | -322,000 |
| Income Before Tax | 3,213,000 | 2,544,000 | 3,200,000 | 2,884,000 |
| Income Tax Expense | 597,000 | 302,000 | 619,000 | 599,000 |
| Minority Interest | - | - | - | - |
| Net Income From Continuing Ops | 2,616,000 | 2,242,000 | 2,581,000 | 2,285,000 |
| Non-recurring Events |
| Discontinued Operations | - | - | - | - |
| Extraordinary Items | - | - | - | - |
| Effect Of Accounting Changes | - | - | - | - |
| Other Items | - | - | - | - |
| Net Income |
| Net Income | 2,616,000 | 2,242,000 | 2,581,000 | 2,285,000 |
| Preferred Stock And Other Adjustments | - | - | - | - |
| Net Income Applicable To Common Shares | 2,522,000 | 2,149,000 | 2,485,000 | 2,185,000 |