Note 2 - Business Segment Information - Long-lived Assets by Geographical Region (Details) - USD ($) $ in Thousands		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Long-Lived Assets	[1]	$ 52,844	$ 51,723	$ 46,430
UNITED STATES
Long-Lived Assets	[1]	52,844	51,723	46,430
CANADA
Long-Lived Assets	[1]

[1] Long-lived assets include property, plant and equipment, and other long term assets. Goodwill and intangible assets are not included in long-lived assets.