| Schedule of Inventory, Current [Table Text Block] |
| | | Gross | | | Reserve | | | Net | |
| Raw Materials | | $ | 3,456,000 | | | $ | (551,000 | ) | | $ | 2,905,000 | |
| Work-In-Process | | | 5,416,000 | | | | (4,021,000 | ) | | | 1,395,000 | |
| Finished Goods | | | 753,000 | | | | (486,000 | ) | | | 267,000 | |
| Totals | | $ | 9,625,000 | | | $ | (5,058,000 | ) | | $ | 4,567,000 | |
| | | 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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