Note 7 - Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020
Amortized intangible assets, gross	$ 86,235	$ 54,625
Accumulated amortization	25,564	28,087
Amortized intangible assets, net	60,671	26,538
Indefinite-lived intangible assets, gross	12,102	3,422
Total other intangible assets, gross	98,337	58,047
Total other intangible assets, net	72,773	29,960
Trademarks and Trade Names [Member]
Indefinite-lived intangible assets, gross	12,102	3,422
Customer Relationships [Member]
Amortized intangible assets, gross	62,083	35,563
Accumulated amortization	10,967	14,129
Amortized intangible assets, net	51,116	21,434
Patents [Member]
Amortized intangible assets, gross	268	338
Accumulated amortization	237	277
Amortized intangible assets, net	31	61
Technology-Based Intangible Assets [Member]
Amortized intangible assets, gross	20,966
Accumulated amortization	13,415
Amortized intangible assets, net	7,551
LED Technology Firmware Software [Member]
Amortized intangible assets, gross		16,066
Accumulated amortization		12,852
Amortized intangible assets, net		3,214
Trade Names [Member]
Amortized intangible assets, gross	2,658	2,658
Accumulated amortization	939	829
Amortized intangible assets, net	1,719	$ 1,829
Noncompete Agreements [Member]
Amortized intangible assets, gross	260
Accumulated amortization	6
Amortized intangible assets, net	$ 254