Note 2 - Segment Information (Details Textual) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)
Number of Reportable Segments			2
Intersegment Eliminations [Member] | North American Segment [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 1,063	$ 1,555	$ 3,079	$ 3,736
Intersegment Eliminations [Member] | International Segment [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 2,722	$ 3,922	$ 10,820	$ 10,985