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Note 2 - Summary of Significant Accounting Policies - Useful Life of Property, Plant, and Equipment (Details)	12 Months Ended
	Jun. 30, 2022
Building [Member]
Property, plant, and equipment, useful life (Year)	39 years
Machinery and Equipment [Member] \| Minimum [Member]
Property, plant, and equipment, useful life (Year)	5 years
Machinery and Equipment [Member] \| Maximum [Member]
Property, plant, and equipment, useful life (Year)	10 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)	5 years
Vehicles [Member] \| Minimum [Member]
Property, plant, and equipment, useful life (Year)	3 years
Vehicles [Member] \| Maximum [Member]
Property, plant, and equipment, useful life (Year)	5 years