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Intangible Assets, Net
3 Months Ended
Mar. 31, 2020
Goodwill And Intangible Assets Disclosure [Abstract]  
Intangible Assets, Net

5. Intangible Assets, net

Intangible assets are related to certain capitalized milestone and sublicense payments. The following table presents intangible assets (in thousands):

 

 

 

March 31, 2020

 

 

December 31, 2019

 

Intangible assets

 

$

19,773

 

 

$

19,773

 

Less accumulated amortization

 

 

(19,571

)

 

 

(17,273

)

Total

 

$

202

 

 

$

2,500

 

 

We recorded $2.3 million of cost of sales - amortization of intangible assets for each of the three months ended March 31, 2020 and 2019. See Note 7.