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Tax (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Specification of income tax [Abstract] |  |  |  |  |
Income tax payable |  | $ 378 | $ 587 | $ 111 |
Tax expenses related to previous year |  | (27) | 309 | 32 |
Change in deferred tax |  | 9 | 5 | (12) |
Total income tax expense |  | 360 | 900 | 131 |
Specification of Temporary Differences and Deferred Tax [Abstract] |  |  |  |  |
Property, plant and equipment |  | (11) | 2 | (13) |
Pensions |  | (662) | (612) | (420) |
Total basis for deferred tax |  | (674) | (610) | (432) |
Deferred tax liability (asset), net | [1],[2] | (152) | (140) | (102) |
Deferred tax (asset), gross | [3] | (166) | (161) | (126) |
Deferred tax liability, gross | [3] | 14 | 21 | 24 |
Reconciliation of income tax expense [Abstract] |  |  |  |  |
Profit/(loss) before income tax |  | (11,147) | 267,181 | 73,812 |
Expected income tax assessed at the tax rate for the Parent company (0%) |  | 0 | 0 | 0 |
Adjusted for tax effect of the following items [Abstract] |  |  |  |  |
Income in subsidiary, subject to income tax |  | 360 | 900 | 131 |
Total income tax expense |  | $ 360 | $ 900 | $ 131 |
Expected income tax rate |  | 0.00% | 0.00% | 0.00% |
Changes in Tax Rates [Member] |  |  |  |  |
Specification of Temporary Differences and Deferred Tax [Abstract] |  |  |  |  |
General income tax rate |  |  |  | 22.00% | 23.00%
[1] | Due to materiality, recognized in prepaid expenses and not on a separate line in the statements of financial position.
[2] | The general income tax rate was reduced from 23% to 22%, effective from fiscal year 2019.
[3] | Deferred tax liability is related to the subsidiary in Singapore and cannot be offset with the deferred tax asset related to the subsidiary in Norway.

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