Note 11 - Segment Information - Summary of Financial Results for Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Mar. 31, 2018		Mar. 31, 2017		Mar. 31, 2018		Mar. 31, 2017
Sales	$ 54,834	[1]	$ 50,670	[2]	$ 158,776	[3]	$ 152,770	[4]
Operating Income (Loss)	2,213		(853)		3,106		(874)
North American Segment [Member]
Sales	34,119	[1]	31,791	[2]	94,937	[3]	92,345	[4]
Operating Income (Loss)	2,831		1,563		5,545		4,520
International [Member]
Sales	20,715	[1]	18,879	[2]	63,839	[3]	60,425	[4]
Operating Income (Loss)	629		(693)		1,629		(143)
Unallocated [Member]
Sales		[1]		[2]		[3]		[4]
Operating Income (Loss)	$ (1,247)		$ (1,723)		$ (4,068)		$ (5,251)

[1] Excludes $4,804 of North American segment intercompany sales to the International segment, and $10,290 of International segment intercompany sales to the North American segment.

[2] Excludes $6,189 of North American segment intercompany sales to the International segment, and $8,585 of International segment intercompany sales to the North American segment.

[3] Excludes $4,804 of North American segment intercompany sales to the International segment, and $10,290 of International segment intercompany sales to the North American segment.

[4] Excludes $6,189 of North American segment intercompany sales to the International segment, and $8,585 of International segment intercompany sales to the North American segment.