Note 2 - Segment Information - Summary of Financial Results for Reportable Segments (Details) - USD ($)	3 Months Ended				6 Months Ended
	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2018		Dec. 31, 2017
Sales	$ 56,532,000	[1]	$ 52,124,000	[2]	$ 108,433,000	[1]	$ 103,942,000	[2]
Operating Income (Loss)	3,280,000		444,000		4,048,000		893,000
North American Segment [Member]
Sales	34,628,000	[1]	31,100,000	[2]	64,828,000	[1]	60,818,000	[2]
Operating Income (Loss)	2,938,000		1,294,000		3,167,000		2,989,000
International [Member]
Sales	21,904,000	[1]	21,024,000	[2]	43,605,000	[1]	43,124,000	[2]
Operating Income (Loss)	1,716,000		315,000		3,810,000		727,000
Unallocated [Member]
Sales		[1]		[2]		[1]		[2]
Operating Income (Loss)	$ (1,374,000)		$ (1,165,000)		$ (2,929)		$ (2,823,000)

[1] Excludes $1,047 of North American segment intercompany sales to the International segment, and $3,744 of International segment intercompany sales to the North American segment.

[2] Excludes $1,581 of North American segment intercompany sales to the International segment, and $3,298 of International segment intercompany sales to the North American segment.