Quarterly report pursuant to Section 13 or 15(d)

Note 3 - Revenue - Disaggregation of Revenue (Details)

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Note 3 - Revenue - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Total revenue $ 1,936 $ 10,988
Seattle Genetics Inc. [Member]    
Total revenue 1,423 312
Astra Zeneca A B [Member]    
Total revenue 434 4,753
Les Laboratoires Servier And Institut De Recherches Internationales Servier [Member]    
Total revenue (74) 4,734
Genentech [Member]    
Total revenue $ 153 $ 1,189