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Note 3 - Property and Equipment - Property and Equipment (Details) - USD ($)
Mar. 31, 2020
Jun. 30, 2019
Machinery and equipment $ 2,222,670 $ 2,222,670
Buildings and structures 401,470 401,470
Computers and office equipment 171,485 173,245
Total 2,795,625 2,797,385
Less accumulated depreciation (2,794,050) (2,794,769)
Net $ 1,575 $ 2,616