Note 2 - Summary of Significant Accounting Policies - Useful Life of Property, Plant, and Equipment (Details)	6 Months Ended
	Dec. 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
Minimum [Member] | Building [Member]
Property, plant, and equipment, useful life (Year)	10 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
Maximum [Member] | Building [Member]
Property, plant, and equipment, useful life (Year)	39 years