| Condensed Balance Sheet [Table Text Block] |
| | | | | | | | | Trade accounts receivable | | $ | 23,866 | | | $ | 22,284 | | | Other receivables | | | 284 | | | | 511 | | Allowance for doubtful accounts (a)
| | | (985 | ) | | | (171 | ) | | | | $ | 23,165 | | | $ | 22,624 | | | | | | | | | | | | | $ | 15,948 | | | $ | 14,863 | | | Work in process | | | 2,614 | | | | 1,557 | | | Finished goods | | | 2,139 | | | | 3,678 | | | Parts | | | 516 | | | | 576 | | | Inventories | | $ | 21,217 | | | $ | 20,674 | | | | | | | | | | | Cost: | | | | | | | | | | Land | | $ | 1,648 | | | $ | 1,648 | | | Buildings | | | 9,852 | | | | 9,852 | | Machinery and equipment (a) (b) (c)
| | | 30,308 | | | | 31,615 | | | Office furniture and equipment | | | 532 | | | | 556 | | Co mputer hardware and software
| | | 3,118 | | | | 3,544 | | | Leasehold improvements | | | 2,127 | | | | 2,129 | | | | | | 47,585 | | | | 49,344 | | | Less accumulated depreciation: | | | | | | | | | | Land | | | — | | | | — | | | Buildings | | | (8,508 | ) | | | (8,174 | ) | Machinery and equipment (a) (b) (c)
| | | (24,160 | ) | | | (22,460 | ) | | Office furniture and equipment | | | (405 | ) | | | (438 | ) | Co mputer hardware and software
| | | (2,516 | ) | | | (2,842 | ) | | Leasehold improvements | | | (1,034 | ) | | | (993 | ) | | | | | (36,623 | ) | | | (34,907 | ) | Property, plant and equipment —net
| | $ | 10,962 | | | $ | 14,437 | | | | | | | | | | | Customer related | | $ | 1,808 | | | $ | 898 | | | Payroll | | | 2,540 | | | | 2,134 | | | Professional services | | | 368 | | | | 281 | | | | | | 185 | | | | 27 | | | Vendor related | | | 396 | | | | 613 | | | Other | | | 517 | | | | 651 | | | Accrued liabilities | | $ | 5,814 | | | $ | 4,604 | | |