13. Intangible assets


	In process technology		Software & databases		Brands, licenses, patents & know-how		Contract costs		Total
	(Euro, in thousands)
Acquisition value
On January 1 , 2017	€	5,561	€	7,185	€	1,523	€	—	€	14,269
Additions		1,500		623		2				2,125
Sales and disposals				(100)						(100)
Translation differences				(212)						(212)
On December 31, 2017		7,061		7,496		1,525		—		16,082
Additions				1,561		1,763				3,325
Sales and disposals		(7,061)		(20)		(569)				(7,650)
Translation differences				74						74
On December 31, 2018		—		9,111		2,719		—		11,832
Additions				5,463		2,453		15,384		23,300
Sales and disposals				(64)						(64)
Translation differences				31						31
On December 31, 2019		—		14,541		5,172		15,384		35,099

Amortization and impairment
On January 1 , 2017		5,561		6,182		1,501		—		13,246
Amortization				644		8				652
Sales and disposals				(99)						(99)
Translation differences				(212)						(212)
On December 31, 2017		5,561		6,514		1,509		—		13,587
Amortization		417		681		9				1,107
Impairment		1,083								1,083
Sales and disposals		(7,061)		(20)		(569)				(7,650)
Translation differences				74						74
On December 31, 2018		—		7,250		949		—		8,200
Amortization				816		678		512		2,006
Sales and disposals				(63)						(63)
Translation differences				31						31
On December 31, 2019		—		8,034		1,626		512		10,173

Carrying amount
On December 31, 2017	€	1,500	€	982	€	16	€	—	€	2,495
On December 31, 2018	€	—	€	1,862	€	1,771	€	—	€	3,632
On December 31, 2019	€	—	€	6,507	€	3,546	€	14,872	€	24,927

On December 31, 2019, our balance sheet did not hold any internally generated assets capitalized as intangible asset.