Note 3 - Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

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

	Years Ended December 31,
	2019		2018		2017
	(in thousands)
Cash paid for:
Interest	$	664	$	1,303	$	47
Income taxes, net of refunds	$	1,255	$	3,463	$	3,878
Non-cash investing and financing activities:
Capital additions accrued but not yet paid	$	213	$	218	$	85