| Condensed Balance Sheet [Table Text Block] |
| | | | | | | | | Trade accounts receivable | | $ | 30,604 | | | $ | 28,793 | | | Other receivables | | | 298 | | | | 317 | | | Allowance for doubtful accounts | | | — | | | | — | | | Total | | $ | 30,902 | | | $ | 29,110 | | | | | | | | | | | Opening balance – January 1, 2018 | | $ | 3,734 | | | $ | — | | | Contract assets invoiced | | | (3,734 | ) | | | — | | | Unbilled contract assets | | | 5,469 | | | | — | | | Ending balance | | $ | 5,469 | | | $ | — | | | | | | | | | | | Raw materials | | $ | 18,786 | | | $ | 17,668 | | | Work in process | | | — | | | | 1,874 | | | Finished goods (1) | | | 1,005 | | | | 3,029 | | | Parts | | | 577 | | | | 411 | | | Provision for obsolescence | | | (445 | ) | | | (619 | ) | | Total | | $ | 19,923 | | | $ | 18,949 | | | | | | | | | | | Cost: | | | | | | | | | | Land | | $ | 1,648 | | | $ | 1,648 | | | Buildings | | | 9,903 | | | | 9,852 | | | Machinery and equipment (a) (b) | | | 30,336 | | | | 30,319 | | | Office furniture and equipment | | | 522 | | | | 534 | | | Computer hardware and software | | | 3,274 | | | | 3,173 | | | Leasehold improvements | | | 2,100 | | | | 2,160 | | | | | | 47,783 | | | | 47,686 | | | | | | | | | | | | | Less accumulated depreciation: | | | | | | | | | | Land | | | — | | | | — | | | Buildings | | | (8,764 | ) | | | (8,619 | ) | | Machinery and equipment (a) (b) | | | (25,124 | ) | | | (24,650 | ) | | Office furniture and equipment | | | (410 | ) | | | (413 | ) | | Computer hardware and software | | | (2,742 | ) | | | (2,622 | ) | | Leasehold improvements | | | (1,151 | ) | | | (1,113 | ) | | | | | (38,191 | ) | | | (37,417 | ) | | Property, plant and equipment—net | | $ | 9,592 | | | $ | 10,269 | | | | | | | | | | | Customer related | | $ | 1,433 | | | $ | 936 | | | Payroll | | | 2,811 | | | | 2,485 | | | Professional services | | | 407 | | | | 328 | | | Restructuring | | | 95 | | | | 109 | | | Vendor related | | | 740 | | | | 493 | | | Other | | | 567 | | | | 526 | | | Total | | $ | 6,053 | | | $ | 4,877 | | |