| Schedule of Inventory, Current [Table Text Block] |
| | | 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 | |
| | | Gross | | | Reserve | | | Net | |
| Raw Materials | | $ | 2,287,000 | | | $ | (463,000 | ) | | $ | 1,824,000 | |
| Work-In-Process | | | 5,171,000 | | | | (4,001,000 | ) | | | 1,170,000 | |
| Finished Goods | | | 938,000 | | | | (492,000 | ) | | | 446,000 | |
| Totals | | $ | 8,396,000 | | | $ | (4,956,000 | ) | | $ | 3,440,000 | |
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