QUARTERLY FINANCIAL INFORMATION (unaudited)- Summary of Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 61,235	$ 54,944	$ 54,054	$ 49,411	$ 42,475	$ 49,998	$ 56,864	$ 52,114	$ 219,644	$ 201,451	$ 228,022
Gross Margin	22,016	18,149	17,605	15,572	10,827	14,844	18,836	17,703	73,342	62,210	74,941
Earnings / (Loss) Before Income Taxes	5,304	4,513	5,775	1,834	(23,435)	287	1,875	1,276	17,426	(19,997)	9,610
Net Earnings / (Loss)	$ 4,543	$ 3,017	$ 3,857	$ 4,116	$ (24,490)	$ 613	$ 1,260	$ 778	$ 15,533	$ (21,839)	$ 6,079
Basic Earnings / (Loss) Per Share	$ 0.65	$ 0.42	$ 0.54	$ 0.59	$ (3.52)	$ 0.09	$ 0.18	$ 0.11	$ 2.20	$ (3.14)	$ 0.87
Diluted Earnings / (Loss) Per Share	$ 0.60	$ 0.41	$ 0.53	$ 0.57	$ (3.52)	$ 0.09	$ 0.18	$ 0.11	$ 2.11	$ (3.14)	$ 0.87