12. 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.

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