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Trade Receivables (Tables)

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Summary of Trade Receivables


		2017								2016								2015
		Noncurrent				Current				Noncurrent				Current				Noncurrent				Current
Accounts receivable and related parties ⁽¹⁾			2,210				41,972				87				34,729				469				22,959
Provision for doubtful trade receivables			—				(1,323	)			—				(1,084	)			—				(848	)

			2,210				40,649				87				33,645				469				22,111

(1)	See Note 31 for information about related parties.

Summary of Changes in Provision for Doubtful Trade Receivables

Changes in the provision for doubtful trade receivables


		2017								2016								2015
		Noncurrent				Current				Noncurrent				Current				Noncurrent				Current
Balance at beginning of year			—				1,084				—				848				7				866
Increases charged to expenses			—				222				—				197				—				313
Decreases charged to income			—				(194	)			—				(28	)			—				(412	)
Amounts incurred due to utilization			—				—				—				—				(7	)			(17	)
Other movements			—				119				—				—				—				—
Translation differences			—				92				—				67				—				98

Balance at end of year			—				1,323				—				1,084				—				848