Details of intangible assets
| Software and Patents |
Assets under construction |
Total | ||||||||||
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Net book value as of January 1, 2015 |
1,246 | — | 1,246 | |||||||||
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Change in scope |
— | — | — | |||||||||
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Additions to intangible assets |
97 | — | 97 | |||||||||
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Depreciation expense |
(174 | ) | — | (174 | ) | |||||||
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Translation adjustments |
(127 | ) | — | (127 | ) | |||||||
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Net book value as of December 31, 2015 |
1,041 | — | 1,041 | |||||||||
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Gross value at end of period |
2,194 | — | 2,194 | |||||||||
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Accumulated depreciation and impairment at end of period |
(1,153 | ) | — | (1,153 | ) | |||||||
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Net book value as of January 1, 2016 |
1,041 | — | 1,041 | |||||||||
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Additions to intangible assets |
212 | 439 | 652 | |||||||||
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Disposal of intangible assets |
(74 | ) | — | (74 | ) | |||||||
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Depreciation expense |
(226 | ) | — | (226 | ) | |||||||
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Translation adjustments |
(28 | ) | (21 | ) | (49 | ) | ||||||
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Net book value as of December 31, 2016 |
924 | 419 | 1,343 | |||||||||
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Gross value at end of period |
2,256 | 419 | 2,675 | |||||||||
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Accumulated depreciation and impairment at end of period |
(1,332 | ) | — | (1,332 | ) | |||||||
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Net book value as of January 1, 2017 |
924 | 419 | 1,343 | |||||||||
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Additions to intangible assets |
6 | 135 | 141 | |||||||||
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Depreciation expense |
(231 | ) | — | (231 | ) | |||||||
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Translation adjustments |
112 | 66 | 178 | |||||||||
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Net book value as of December 31, 2017 |
811 | 619 | 1,431 | |||||||||
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Gross value at end of period |
2,571 | 517 | 3,190 | |||||||||
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Accumulated depreciation and impairment at end of period |
(1,759 | ) | — | (1,759 | ) | |||||||