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Note 7 - Property and Equipment - Property and Equipment, Depreciation Expense (Details) - USD ($)
3 Months Ended 9 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Depreciation expense $ 150,327 $ 62,207 $ 394,524 $ 184,174