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Note 15 - Income Taxes (Details Textual) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Feb. 28, 2018	Feb. 28, 2017	Feb. 28, 2018	Feb. 28, 2017	Aug. 31, 2018
Income Tax Expense (Benefit)	$ 841,909	$ 124,909	$ 946,900	$ 242,622
Effective Income Tax Rate Reconciliation, Percent	37.20%	20.50%	26.50%	21.30%
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability			$ 700,000
Provisional Adjustments Related to Transition of Tax on Deemed Repatriation of Accumulated Foreign Income			$ 489,000
Scenario, Forecast [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent					25.70%

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Represents the amount of provisional adjustments related to transition of tax on deemed repatriation of accumulated foreign income.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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