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Note 5 - Fixed Assets (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Gain (Loss) on Disposition of Property Plant Equipment, Total     $ (112,110)
Depreciation, Depletion and Amortization, Nonproduction, Total $ 18,000 $ 16,000 $ 51,000 $ 32,000