Note 14 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Aug. 31, 2020	Aug. 31, 2019
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%
Foreign Withholding Tax	$ (76,000)	$ 4,000
Tax Credit Carryforward, Amount	3,312,400
Deferred Tax Assets, Operating Loss Carryforwards, Domestic, State, and Local	1,260,600
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	251,200
Tax Credit Carryforward, Valuation Allowance	11,561,700
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	2,797,000	133,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	0	0
Foreign Tax Authority [Member]
Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration	$ 229,200
Tax Credit Carryforward, Valuation Allowance		5,790,500
Federal and State Tax [Member]
Tax Credit Carryforward, Valuation Allowance		$ 2,973,800