Note 10 - Accrued Expenses (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Schedule of Accrued Liabilities [Table Text Block]

	December 31,
(in thousands)	2019		2018
Research and development	$	1,415		2,361
Professional fees		543	$	2,473
Salaries, bonus & benefits		696		815
Manufacturing operations		183		212
Other		389		604
Total accrued expenses	$	3,226	$	6,465