13. Intangible assets
(thousands of €)  | 
      In process  | 
      Software &  | 
      Brands,
  | 
      Contract cost  | 
      Total  | 
    
|---|---|---|---|---|---|
Acquisition value  | 
      
  | 
      
  | 
      
  | 
      
  | 
      
  | 
    
  | 
      
  | 
      
  | 
      
  | 
      
  | 
      
  | 
    
On 1 January 2018  | 
      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 31 December 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 31 December 2019  | 
      –  | 
      14,541  | 
      5,172  | 
      15,384  | 
      35,099  | 
    
  | 
      
  | 
      
  | 
      
  | 
      
  | 
      
  | 
    
Amortization and impairment  | 
      
  | 
      
  | 
      
  | 
      
  | 
      
  | 
    
  | 
      
  | 
      
  | 
      
  | 
      
  | 
      
  | 
    
On 1 January 2018  | 
      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 31 December 2018  | 
      –  | 
      7,250  | 
      949  | 
      –  | 
      8,200  | 
    
Amortization  | 
      
  | 
      816  | 
      678  | 
      512  | 
      2,006  | 
    
Sales and disposals  | 
      
  | 
      (63)  | 
      
  | 
      
  | 
      (63)  | 
    
Translation differences  | 
      
  | 
      31  | 
      
  | 
      
  | 
      31  | 
    
On 31 December 2019  | 
      –  | 
      8,034  | 
      1,626  | 
      512  | 
      10,173  | 
    
  | 
      
  | 
      
  | 
      
  | 
      
  | 
      
  | 
    
Carrying amount  | 
      
  | 
      
  | 
      
  | 
      
  | 
      
  | 
    
  | 
      
  | 
      
  | 
      
  | 
      
  | 
      
  | 
    
On 31 December 2018  | 
      –  | 
      1,862  | 
      1,771  | 
      –  | 
      3,632  | 
    
On 31 December 2019  | 
      –  | 
      6,507  | 
      3,546  | 
      14,872  | 
      24,927  | 
    
New additions primarily related to the capitalization of contract costs related to the recent deal with Gilead, which are being amortized on a straight-line basis over a period of 10 years.
On 31 December 2019, our balance sheet did not hold any internally generated assets capitalized as intangible asset.