Note 11 - Segment Information (Tables)

6 Months Ended

Jun. 30, 2018

Notes Tables

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

	June 30, 2018		December 31, 2017
Long-lived assets:
United States	$	76,871	$	72,562
Canada		2,381		2,495
Total	$	79,252	$	75,057
Total assets:
United States	$	97,101	$	110,785
Canada		5,784		16,531
Total	$	102,855	$	127,316