Note 1 - Summary of Accounting Policies - Useful Lives of Intangible Assets (Details)	12 Months Ended
	Jun. 30, 2018
Customer Relationships [Member] | Minimum [Member]
Intangible assets, useful life (Year)	5 years
Customer Relationships [Member] | Maximum [Member]
Intangible assets, useful life (Year)	16 years
Patents [Member]
Intangible assets, useful life (Year)	12 years
Noncompete Agreements [Member] | Minimum [Member]
Intangible assets, useful life (Year)	5 years
Noncompete Agreements [Member] | Maximum [Member]
Intangible assets, useful life (Year)	10 years
Other Intangible Assets [Member]
Intangible assets, useful life (Year)	10 years
Developed Technology Rights [Member] | Minimum [Member]
Intangible assets, useful life (Year)	10 years
Developed Technology Rights [Member] | Maximum [Member]
Intangible assets, useful life (Year)	20 years