Note 7 - Accrued Expenses (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Schedule of Accrued Liabilities [Table Text Block]

	December 31,
	2022		2021
	(000's)
Project expenses	$	10,038	$	704
Compensation and benefits		1,556		1,601
Accrued milestone		—		6,000
Other		96		470
Total accrued expenses	$	11,690	$	8,775