FINANCIAL INFORMATION BY SEGMENT & GEOGRAPHIC AREA - Geographic Sales and Long-Lived Assets (Details) - USD ($)	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
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales									$ 219,644,000	$ 201,451,000	$ 228,022,000
Long-lived Assets	$ 65,011,000				$ 68,585,000				65,011,000	68,585,000	70,112,000
Total Long-Lived Assets	46,193,000				47,567,000				46,193,000	47,567,000	49,806,000
Net sales	61,235,000	$ 54,944,000	$ 54,054,000	$ 49,411,000	42,475,000	$ 49,998,000	$ 56,864,000	$ 52,114,000	219,644,000	201,451,000	228,022,000
Intersegment Eliminations | North American Segment
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									4,323,000	4,040,000	4,879,000
Intersegment Eliminations | International Segment
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									12,765,000	13,820,000	16,187,000
North American Segment
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales									119,619,000	121,834,000	136,387,000
Long-lived Assets	31,006,000				34,354,000				31,006,000	34,354,000	35,638,000
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales									111,935,000	113,989,000	127,359,000
Long-lived Assets	30,935,000				34,264,000				30,935,000	34,264,000	35,594,000
Canada & Mexico
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales									7,684,000	7,845,000	9,028,000
Long-lived Assets	71,000				90,000				71,000	90,000	44,000
International
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales									100,025,000	79,617,000	91,635,000
Long-lived Assets	15,187,000				13,213,000				15,187,000	13,213,000	14,168,000
Brazil
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales									65,198,000	49,254,000	54,324,000
Long-lived Assets	10,796,000				8,050,000				10,796,000	8,050,000	10,067,000
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales									19,783,000	18,869,000	24,042,000
Long-lived Assets	1,320,000				1,948,000				1,320,000	1,948,000	2,046,000
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales									7,746,000	6,048,000	7,370,000
Long-lived Assets	2,713,000				2,881,000				2,713,000	2,881,000	1,944,000
Australia & New Zealand
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales									7,298,000	5,446,000	5,899,000
Long-lived Assets	$ 358,000				$ 334,000				$ 358,000	$ 334,000	$ 111,000