Note 12 - Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]

	Year ended December 31,
	2019		2018		2017
	(in thousands)
Cash paid for income taxes, net	$	4,817	$	5,521	$	3,146