Note 3 - Revenue (Tables)

9 Months Ended

Sep. 30, 2023

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Seagen	$	9,179	$	155	$	14,088	$	3,074
AstraZeneca		3,909		4,404		8,399		9,026
Servier		3,951		258		3,846		5,223
Genentech		—		553		12,697		2,733
Boston Pharmaceuticals		2,481		—		2,481		—
Total Revenue	$	19,520	$	5,370	$	41,511	$	20,056

Revenue From Contract With Customer, Milestone Payments [Table Text Block]

	Research, Development, Regulatory & Commercial Milestones		Sales Milestones
Seagen	$	759	$	450
Servier		103		95
Boston Pharmaceuticals		85		265
Total potential milestone payments	$	947	$	810