Note 15 - Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

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

	Year Ended December 31,
	2016		2015		2014
Income taxes paid	$	5,076,000	$	6,897,000	$	5,274,000
Interest paid	$	694,000	$	523,000	$	466,000