Note 9 - Accrued Expenses (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Schedule of Accrued Liabilities [Table Text Block]

	December 31,
	2019		2018
Compensation and related expenses	$	5,830	$	4,446
Professional fees		3,850		1,989
Lease liability - current		1,141		–
Income taxes payable		–		385
Research grants		393		400
Clinical trial costs		788		577
Other		443		349
Total	$	12,445	$	8,146