Note 11 - Segment Information (Tables)

9 Months Ended

Sep. 30, 2018

Notes Tables

Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]

	September 30, 2018		December 31, 2017
Long-lived assets:
United States	$	77,520	$	72,562
Canada		2,427		2,495
Total	$	79,947	$	75,057
Total assets:
United States	$	91,442	$	110,785
Canada		17,275		16,531
Total	$	108,717	$	127,316