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Note 15 - Income Taxes (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Feb. 28, 2019
Feb. 28, 2018
Feb. 28, 2019
Feb. 28, 2018
Income Tax Expense (Benefit), Total $ 246,371 $ 841,909 $ 502,074 $ 946,900