| Revenue | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 |
| Total Revenue | 33,297,000 | 27,452,000 | 23,399,000 | 25,188,000 |
| Cost of Revenue | 27,662,000 | 23,731,000 | 20,225,000 | 20,718,000 |
| Gross Profit | 5,635,000 | 3,721,000 | 3,174,000 | 4,470,000 |
| Operating Expenses |
| Research Development | - | - | - | - |
| Selling General and Administrative | 1,015,000 | 1,005,000 | 1,248,000 | 1,117,000 |
| Non Recurring | - | - | - | - |
| Others | - | - | - | - |
| Total Operating Expenses | 30,205,000 | 27,091,000 | 23,195,000 | 23,358,000 |
| Operating Income or Loss | 3,092,000 | 361,000 | 204,000 | 1,830,000 |
| Income from Continuing Operations |
| Total Other Income/Expenses Net | -19,000 | 221,000 | 2,240,000 | 93,000 |
| Earnings Before Interest and Taxes | 3,092,000 | 361,000 | 204,000 | 1,830,000 |
| Interest Expense | -108,000 | -78,000 | -72,000 | -39,000 |
| Income Before Tax | 3,073,000 | 582,000 | 2,444,000 | 1,923,000 |
| Income Tax Expense | 759,000 | 92,000 | 279,000 | 801,000 |
| Minority Interest | - | - | - | - |
| Net Income From Continuing Ops | 2,314,000 | 490,000 | 2,165,000 | 1,122,000 |
| Non-recurring Events |
| Discontinued Operations | - | - | - | - |
| Extraordinary Items | - | - | - | - |
| Effect Of Accounting Changes | - | - | - | - |
| Other Items | - | - | - | - |
| Net Income |
| Net Income | 2,314,000 | 490,000 | 2,165,000 | 1,122,000 |
| Preferred Stock And Other Adjustments | - | - | - | - |
| Net Income Applicable To Common Shares | 2,314,000 | 490,000 | 2,165,000 | 1,122,000 |