Intangible Assets

12 Months Ended

Dec. 31, 2020

7.	INTANGIBLE ASSETS


	2020			2019			2018
Net book value of intangible assets		41,245			37,608			20,402
Provision for impairment of intangible assets		(2,126	)		(429	)		—

		39,119			37,179			20,402

The evolution of the Group’s intangible assets for the years ended December 31, 2020, 2019 and 2018 is as follows:


	Service concession			Exploration rights			Other intangibles			Total
Cost		14,824			3,465			6,830			25,119
Accumulated amortization		9,180			—			5,963			15,143

Balance as of December 31, 2017		5,644			3,465			867			9,976

Cost
Increases		1,303			276			765			2,344
Translation effect		15,544			3,414			6,636			25,594
Adjustment for inflation (1)		—			—			591			591
Decreases and reclassifications		31			(248	)		(100	)		(317	)

Accumulated amortization
Increases		1,190			—			559			1,749
Translation effect		9,740			—			6,243			15,983
Adjustment for inflation (1)		—			—			58			58
Decreases and reclassifications		—			—			(4	)		(4	)

Cost		31,702			6,907			14,722			53,331
Accumulated amortization		20,110			—			12,819			32,929

Balance as of December 31, 2018		11,592			6,907			1,903			20,402

Cost
Increases		1,271			4,171	(2)		705			6,147
Translation effect		18,969			5,680			7,862			32,511
Adjustment for inflation (1)		—			—			833			833
Decreases and reclassifications		(6	)		(103	)		181			72

Accumulated amortization
Increases		1,848			—			526			2,374
Translation effect		12,332			—			7,475			19,807
Adjustment for inflation (1)		—			—			199			199
Decreases and reclassifications		—			—			(23	)		(23	)

Cost		51,936			16,655			24,303			92,894
Accumulated amortization		34,290			—			20,996			55,286

Balance as of December 31, 2019		17,646			16,655			3,307			37,608

Cost
Increases		1,049			715			870			2,634
Translation effect		21,213			6,528			8,768			36,509
Adjustment for inflation (1)		—			—			1,070			1,070
Decreases and reclassifications		(1	)		(10,462	)		319			(10,144	)

Accumulated amortization
Increases		2,659			—			769			3,428
Translation effect		14,395			—			8,358			22,753
Adjustment for inflation (1)		—			—			251			251
Decreases and reclassifications		—			—			—			—

Cost		74,197			13,436			35,330			122,963
Accumulated amortization		51,344			—			30,374			81,718

Balance as of December 31, 2020		22,853			13,436			4,956			41,245

(1)	Corresponds to adjustment for inflation of opening balances of intangible assets in subsidiaries with the Peso as functional currency which was charged to other comprehensive income.

(2)	See Note 3.

Set forth below is the evolution of the provision for impairment of intangible assets for the years ended December 31, 2020 and 2019:


	2020		2019
Amount at beginning of year		429		—
Increase charged to profit or loss		1,399		429
Result from net monetary position (1)		152		—
Translation differences		146		—

Amount at end of year		2,126		429

(1)	Includes adjustment for inflation of opening balances of the provision for impairment of intangible assets in subsidiaries with the Peso as functional currency which was charged to other comprehensive income and the adjustment for inflation of the fiscal year, which was charged to results.