Note 11 - Segment Information (Details Textual) $ in Thousands	3 Months Ended				6 Months Ended
	Dec. 31, 2017 USD ($)		Dec. 31, 2016 USD ($)		Dec. 31, 2017 USD ($)		Dec. 31, 2016 USD ($)
Number of Reportable Segments					2
Revenue, Net	$ 52,124	[1]	$ 53,187	[2]	$ 103,942	[3]	$ 102,100	[4]
North American Segment [Member]
Revenue, Net	31,100	[1]	32,151	[2]	60,818	[3]	60,554	[4]
Intersegment Eliminations [Member] | North American Segment [Member]
Revenue, Net	1,581		2,339		3,277		4,696
Intersegment Eliminations [Member] | International Segment [Member]
Revenue, Net	$ 3,298		$ 2,968		$ 6,688		$ 6,049

[1] Excludes $3,277 of North American segment intercompany sales to the International segment, and $ 6,688 of International segment intercompany sales to the North American segment.

[2] Excludes $4,696 of North American segment intercompany sales to the International segment, and $6,049 of International segment intercompany sales to the North American segment.

[3] Excludes $3,277 of North American segment intercompany sales to the International segment, and $ 6,688 of International segment intercompany sales to the North American segment.

[4] Excludes $4,696 of North American segment intercompany sales to the International segment, and $6,049 of International segment intercompany sales to the North American segment.