Note 17 - Financial Information by Segment and Geographic Area (Details Textual) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2017 USD ($)		Jun. 30, 2016 USD ($)		Jun. 30, 2015 USD ($)
Number of Reportable Segments											2		1
Revenue, Net	$ 54,253	$ 50,670	$ 53,187	$ 48,913	$ 54,647	$ 50,329	$ 53,671	$ 51,038	$ 207,023	[1]	$ 209,685	[2]	$ 241,550	[3]
North American Segment [Member]
Revenue, Net									124,606	[1]	130,108	[2]	137,085	[3]
North American Segment [Member] | Intersegment Eliminations [Member]
Revenue, Net									7,902		8,259		12,276
International Segment [Member] | Intersegment Eliminations [Member]
Revenue, Net									$ 11,677		$ 9,282		$ 9,842

[1] Excludes $7,902 of North American segment sales to the International segment and $11,677 sales of the International segment to the North American segment.

[2] Excludes $8,259 of North American segment sales to the International segment and $9,282 sales of the International segment to the North American segment.

[3] Excludes $12,276 of North American segment sales to the International segment and $9,842 sales of the International segment to the North American segment.