Note 3 - Revenue From Contracts With Customers - Revenue From Contracts With Customers (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2019		Sep. 30, 2018
Net sales	$ 52,114	[1]	$ 51,901	[2]
North American Segment [Member]
Net sales	31,009	[1]	30,200	[2]
International Segment [Member]
Net sales	21,105		21,701
UNITED STATES | North American Segment [Member]
Net sales	28,624		27,947
Canada and Mexico [Member] | North American Segment [Member]
Net sales	2,385		2,253
BRAZIL | International Segment [Member]
Net sales	12,822		12,367
UNITED KINGDOM | International Segment [Member]
Net sales	5,231		6,017
CHINA | International Segment [Member]
Net sales	1,514		1,708
Australia and New Zealand [Member] | International Segment [Member]
Net sales	$ 1,538		$ 1,609

[1] Excludes $968 of North American segment intercompany sales to the International segment, and $4,242 of International segment intercompany sales to the North American segment.

[2] Excludes $1,134 of North American segment intercompany sales to the International segment, and $3,320 of International segment intercompany sales to the North American segment.