Note 7 - Accrued Expenses (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Schedule of Accrued Liabilities [Table Text Block]

	December 31,
(in thousands)	2021		2020
Research and development	$	1,500	$	1,207
Salaries, bonus and benefits		1,218		1,214
Severance		-		474
Professional fees		391		455
Manufacturing operations		46		41
Other		253		422
Total accrued expenses	$	3,408	$	3,813