Note 18 - Quarterly Financial Data (Unaudited) - Summary of Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2020		Jun. 30, 2019		Jun. 30, 2018
Net Sales	$ 42,475	$ 49,998	$ 56,864	$ 52,114	$ 61,091	$ 58,498	$ 56,532	$ 51,901	$ 201,451	[1]	$ 228,022	[2]	$ 216,328	[3]
Gross Margin	10,827	14,844	18,836	17,703	20,579	19,155	18,548	16,659	62,210		74,941		69,557
Earnings Before Income Taxes	(23,435)	287	1,875	1,276	2,632	3,045	2,991	942	(19,997)		9,610		4,865
Net Earnings / (Loss)	$ (24,490)	$ 613	$ 1,260	$ 778	$ 1,481	$ 2,088	$ 1,926	$ 584	$ (21,839)		$ 6,079		$ (3,633)
Basic and Diluted Earnings / (Loss) Per Share (in dollars per share)	$ (3.52)	$ 0.09	$ 0.18	$ 0.11	$ 0.22	$ 0.30	$ 0.27	$ 0.08	$ (3.14)		$ 0.87

[1] Excludes $4,040 of North American segment intercompany sales to the International segment and $13,820 intercompany sales of the International segment to the North American segment.

[2] Excludes $4,879 of North American segment intercompany sales to the International segment and $16,187 intercompany sales of the International segment to the North American segment.

[3] Excludes $6,468 of North American segment intercompany sales to the International segment and $14,239 intercompany sales of the International segment to the North American segment.