Note 7 - Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Goodwill		$ 133,076	$ 99,661
Goodwill acquired		33,415
Accumulated impairment losses	$ (89,288)	(89,288)
Goodwill	45,030	43,788
Measurement period adjustment	1,242
Lighting Segment [Member]
Goodwill		70,971	70,971
Goodwill acquired		0
Accumulated impairment losses	(61,763)	(61,763)
Goodwill	9,208	9,208
Measurement period adjustment	0
Display Solutions Segment [Member]
Goodwill		62,105	$ 28,690
Goodwill acquired		33,415
Accumulated impairment losses	(27,525)	(27,525)
Goodwill	35,822	$ 34,580
Measurement period adjustment	$ 1,242