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v3.21.1

Segment information (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Revenue | $ 13,357 | $ 17,399 | $ 20,104
Operating loss | (1,701) | (440) | (1,059)
Depreciation | 49 | 69 | 60
Capital expenditures, gross | 11 | 21 | 85
Assets | 20,095 | 22,213 |
Liabilities | 5,632 | 6,876 |
Trading and Manufacturing |  |  |
Revenue | 9,476 | 11,877 | 13,770
Operating loss | (488) | (102) | (119)
Depreciation | 39 | 54 | 43
Capital expenditures, gross | 2 | 17 | 79
Assets | 7,877 | 9,843 |
Liabilities | 2,645 | 4,319 |
Engineering |  |  |
Revenue | 3,881 | 5,522 | 6,334
Operating loss | (1,027) | (158) | (821)
Depreciation | 10 | 15 | 17
Capital expenditures, gross | 9 | 4 | 6
Assets | 12,218 | 12,370 |
Liabilities | 2,987 | 2,557 |
Unallocated Corporate Expenses |  |  |
Revenue | 0 |  |
Operating loss | (186) | $ (180) | $ (119)
Depreciation | 0 |  |
Capital expenditures, gross | $ 0 |  |

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