Note 1 - Summary of Accounting Policies - Useful Lives of Property, Plant and Equipment (Details)	12 Months Ended
	Jun. 30, 2018
Building [Member] | Minimum [Member]
Property, plant and equipment, useful life (Year)	40 years
Building [Member] | Maximum [Member]
Property, plant and equipment, useful life (Year)	50 years
Machinery and Equipment [Member] | Minimum [Member]
Property, plant and equipment, useful life (Year)	8 years
Machinery and Equipment [Member] | Maximum [Member]
Property, plant and equipment, useful life (Year)	15 years
Furniture and Fixtures [Member] | Minimum [Member]
Property, plant and equipment, useful life (Year)	3 years
Furniture and Fixtures [Member] | Maximum [Member]
Property, plant and equipment, useful life (Year)	10 years
Computer Equipment [Member] | Minimum [Member]
Property, plant and equipment, useful life (Year)	3 years
Computer Equipment [Member] | Maximum [Member]
Property, plant and equipment, useful life (Year)	7 years