Note 18 - Quarterly Financial Data - Summary of Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2017		Jun. 30, 2016		Jun. 30, 2015
Basic and Diluted Earnings / (Loss) Per Share (in dollars per share)	$ (0.01)	$ (0.11)	$ 0.15	$ 0.11	$ (2.14)	$ 0.09	$ 0.07	$ (0.03)	$ 0.14		$ (2.01)
Net Sales	$ 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]
Gross Margin	16,735	14,479	16,822	13,914	404	14,733	15,999	15,852	61,950		46,988		76,695
Earnings Before Income Taxes	(211)	(1,244)	1,517	1,476	(23,048)	1,199	992	482	1,538		(20,375)		9,942
Net Earnings / (Loss)	$ (45)	$ (786)	$ 1,063	$ 759	$ (15,007)	$ 597	$ 458	$ (178)	$ 991		$ (14,130)		$ 5,244

[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.