Note 11 - Accrued Expenses (Tables)

3 Months Ended

Mar. 31, 2019

Notes Tables

Schedule of Accrued Liabilities [Table Text Block]

	March 31, 2019		December 31, 2018
Compensation and related expenses	$	2,563	$	4,446
Professional fees		1,810		1,989
Research grants		392		400
Clinical trial costs		419		577
Income taxes payable		1,296		385
Lease liability - current		1,075		–
Other		476		349
Total	$	8,031	$	8,146