Note 7 - Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($)	Dec. 31, 2022	Jun. 30, 2022	Jun. 30, 2021
Amortized intangible assets, gross	$ 86,235,000	$ 86,235,000
Accumulated amortization	32,753,000	30,373,000	$ 30,373,000
Amortized intangible assets, net	53,482,000	55,862,000
Indefinite-lived intangible assets, gross	12,102,000	12,102,000
Total other intangible assets, gross	98,337,000	98,337
Other intangible assets, net	65,584,000	67,964,000	$ 67,964,000
Trademarks and Trade Names [Member]
Indefinite-lived intangible assets, gross	12,102,000	12,102,000
Customer Relationships [Member]
Amortized intangible assets, gross	62,083,000	62,083,000
Accumulated amortization	16,108,000	14,400,000
Amortized intangible assets, net	45,975,000	47,683,000
Patents [Member]
Amortized intangible assets, gross	268,000	268,000
Accumulated amortization	268,000	268,000
Amortized intangible assets, net	0	0
LED Technology Firmware Software [Member]
Amortized intangible assets, gross		20,966,000
Accumulated amortization		14,598,000
Amortized intangible assets, net		6,368,000
Trade Names [Member]
Amortized intangible assets, gross	2,658,000	2,658,000
Accumulated amortization	1,102,000	1,049,000
Amortized intangible assets, net	1,556,000	1,609,000
Noncompete Agreements [Member]
Amortized intangible assets, gross	260,000	260,000
Accumulated amortization	84,000	58,000
Amortized intangible assets, net	176,000	$ 202,000
Technology-Based Intangible Assets [Member]
Amortized intangible assets, gross	20,966,000
Accumulated amortization	15,191,000
Amortized intangible assets, net	$ 5,775,000