| Schedule of Inventory, Current [Table Text Block] |
| | | Gross | | | Reserve | | | Net | |
| Raw Materials | | $ | 4,122,000 | | | $ | (558,000 | ) | | $ | 3,564,000 | |
| Work-In-Process | | | 5,498,000 | | | | (4,022,000 | ) | | | 1,476,000 | |
| Finished Goods | | | 775,000 | | | | (486,000 | ) | | | 289,000 | |
| Totals | | $ | 10,395,000 | | | $ | (5,066,000 | ) | | $ | 5,329,000 | |
| | | Gross | | | Reserve | | | Net | |
| Raw Materials | | $ | 3,275,000 | | | $ | (534,000 | ) | | $ | 2,741,000 | |
| Work-In-Process | | | 5,245,000 | | | | (4,017,000 | ) | | | 1,228,000 | |
| Finished Goods | | | 646,000 | | | | (483,000 | ) | | | 163,000 | |
| Totals | | $ | 9,166,000 | | | $ | (5,034,000 | ) | | $ | 4,132,000 | |
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