| Revenue | 12/31/2018 | 12/31/2017 | 12/31/2016 | 12/31/2015 |
| Total Revenue | 49,697,000 | 44,770,000 | 36,099,000 | 37,101,000 |
| Cost of Revenue | 41,167,000 | 36,699,000 | 29,894,000 | 29,655,000 |
| Gross Profit | 8,530,000 | 8,071,000 | 6,205,000 | 7,446,000 |
| Operating Expenses |
| Research Development | 798,000 | 818,000 | 745,000 | 730,000 |
| Selling General and Administrative | 1,794,000 | 1,859,000 | 1,813,000 | 1,794,000 |
| Non Recurring | - | - | - | - |
| Others | - | - | - | - |
| Total Operating Expenses | 44,228,000 | 39,890,000 | 32,796,000 | 32,402,000 |
| Operating Income or Loss | 5,469,000 | 4,880,000 | 3,303,000 | 4,699,000 |
| Income from Continuing Operations |
| Total Other Income/Expenses Net | -1,601,000 | -3,587,000 | -2,087,000 | 3,390,000 |
| Earnings Before Interest and Taxes | 5,469,000 | 4,880,000 | 3,303,000 | 4,699,000 |
| Interest Expense | -1,062,000 | -915,000 | -827,000 | -894,000 |
| Income Before Tax | 3,868,000 | 1,293,000 | 1,216,000 | 8,089,000 |
| Income Tax Expense | 834,000 | 1,953,000 | -269,000 | 1,591,000 |
| Minority Interest | 869,000 | 869,000 | 869,000 | 869,000 |
| Net Income From Continuing Ops | 3,034,000 | -660,000 | 1,485,000 | 6,498,000 |
| Non-recurring Events |
| Discontinued Operations | - | - | - | - |
| Extraordinary Items | - | - | - | - |
| Effect Of Accounting Changes | - | - | - | - |
| Other Items | - | - | - | - |
| Net Income |
| Net Income | 2,932,000 | -761,000 | 1,432,000 | 6,427,000 |
| Preferred Stock And Other Adjustments | - | - | - | - |
| Net Income Applicable To Common Shares | 2,932,000 | -761,000 | 1,092,000 | 6,087,000 |