Note 7 - Accrued Liabilities (Tables)

3 Months Ended

Mar. 31, 2019

Notes Tables

Schedule of Accrued Liabilities [Table Text Block]

(in thousands)	March 31 , 201 9		December 31, 201 8
Employee related expenses	$	5,382	$	5,536
Corporate tax		1,659		1,616
Professional services		1,109		863
Royalties		17		1,354
Other accrued liabilities		1,210		1,522
Total accrued liabilities	$	9,377	$	10,891