Note 3 - Revenue (Tables)

9 Months Ended

Sep. 30, 2022

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Three Months Ended September 30,					Nine Months Ended September 30,
	2022		2021			2022		2021
Seagen	$	155	$	(280	)	$	3,074	$	424
AstraZeneca		4,404		1,607			9,026		18,309
Servier		258		1,867			5,223		3,379
Genentech		553		863			2,733		863
Total Revenue	$	5,370	$	4,057		$	20,056	$	22,975

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

	Research, Development, Regulatory & Commercial Milestones		Sales Milestones
AstraZeneca	$	702	$	3,925
Servier		118		88
Seagen		754		450
Boston Pharmaceuticals		88		265
Genentech		834		600
Total potential milestone payments	$	2,496	$	5,328