Note 6 - Accrued Expenses (Tables)

6 Months Ended

Jun. 30, 2022

Notes Tables

Schedule of Accrued Liabilities [Table Text Block]

	June 30,		December 31,
	2022		2021
Compensation and benefits	$	845	$	1,601
Project expenses		1,651		704
Accrued milestone		—		6,000
Marketable securities not settled		513		—
Other		292		470
Total accrued expenses	$	3,301	$	8,775