Note 7 - Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jun. 30, 2018
Amortized intangible assets, gross	$ 54,625	$ 54,625
Indefinite-lived intangible assets, gross	3,422	3,422
Total other intangible assets, gross	58,047	58,047
Accumulated amortization	24,710	22,638
Amortized intangible assets, net	29,915	31,987
Total other intangible assets, net	33,337	35,409
Trademarks and Trade Names [Member]
Indefinite-lived intangible assets, gross	3,422	3,422
Customer Relationships [Member]
Amortized intangible assets, gross	35,563	35,563
Accumulated amortization	11,556	10,011
Amortized intangible assets, net	24,007	25,552
Patents [Member]
Amortized intangible assets, gross	338	338
Accumulated amortization	239	217
Amortized intangible assets, net	99	121
Technology-Based Intangible Assets [Member]
Amortized intangible assets, gross	16,066	16,066
Accumulated amortization	12,223	11,801
Amortized intangible assets, net	3,843	4,265
Trade Names [Member]
Amortized intangible assets, gross	2,658	2,658
Accumulated amortization	692	609
Amortized intangible assets, net	$ 1,966	$ 2,049