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Pensions - Changes in gross benefit obligation (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Change In Gross Pension Obligation [Abstract] |  |  |
Gross obligation January 1 | $ 1,111 | $ 945 | $ 706
Current service cost | 325 | 360 | 285
Interest charge on pension liabilities | 31 | 27 | 24
Past service cost - curtailment/plan amendment |  | (19) |
Settlement (gain) |  | (128) |
Social security expenses | (44) | (48) | (43)
Remeasurements loss/(gain) | 227 | (18) | (27)
Exchange rate differences | 58 | (8) | (20)
Gross pension obligation December 31 | $ 1,708 | $ 1,111 | $ 925

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- Definition The disclosure of the change in gross pension obligation. + References No definition available. + Details
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- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. + References No definition available. + Details
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- Definition Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. + References No definition available. + Details
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- Definition Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. + References No definition available. + Details
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- Definition Amount of (increase) decrease to benefit obligation of defined benefit plan from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Includes, but is not limited to, lump-sum cash payment to participant in exchange for right to receive specified benefits, purchase of nonparticipating annuity contract and change from remeasurement. + References No definition available. + Details
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- Definition The remeasurements to the gross pension obligation. + References No definition available. + Details
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- Definition Amount of foreign currency translation gain (loss) which (increases) decreases benefit obligation of defined benefit plan. + References No definition available. + Details
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- Definition Amount of cost recognized for passage of time related to defined benefit plan. + References No definition available. + Details
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- Definition The past service cost - curtailment/plan amendment. + References No definition available. + Details
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- Definition The amount of social security expenses. + References No definition available. + Details
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