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Note 2 - Summary of Significant Accounting Policies - Useful Life of Property, Plant, and Equipment (Details)	9 Months Ended
	Mar. 31, 2019
Minimum [Member] \| Machinery and Equipment [Member]
Property, plant, and equipment, useful life (Year)	5 years
Minimum [Member] \| Furniture and Fixtures [Member]
Property, plant, and equipment, useful life (Year)	3 years
Minimum [Member] \| Vehicles [Member]
Property, plant, and equipment, useful life (Year)	3 years
Maximum [Member] \| Machinery and Equipment [Member]
Property, plant, and equipment, useful life (Year)	10 years
Maximum [Member] \| Furniture and Fixtures [Member]
Property, plant, and equipment, useful life (Year)	5 years
Maximum [Member] \| Vehicles [Member]
Property, plant, and equipment, useful life (Year)	5 years