Note 15 - Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

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

	Year Ended December 31,
	201 7		201 6		201 5
Income taxes pai d	$	7,173	$	5,076	$	6,897
Interest pai d	$	727	$	694	$	523