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Intangible assets (Tables)
 9 Months Ended
Sep. 30, 2018
Intangible assets  
Schedule of finite-lived intangible assets

 

 

 

 

 

 

 

 

    

September 30, 

    

December 31, 

 

 

2018

 

2017

 

 

in thousands

Licenses

 

$

7,454

 

$

9,551

Less accumulated amortization and impairment

 

 

(2,243)

 

 

(5,575)

Licenses, net

 

$

5,211

 

$

3,976

Acquired research and development

 

 

 —

 

 

5,594

Intangible assets, net

 

$

5,211

 

$

9,570