Note 14 - Income Taxes - Reconciliation of the Total Amounts of Unrecognized Tax Benefits (Details) - USD ($)	12 Months Ended
	Aug. 31, 2021	Aug. 31, 2020
Gross unrecognized tax benefits – beginning balance	$ 278,200	$ 248,000
Gross increases – prior period tax positions	4,400	15,200
Gross increases – current period tax positions	15,000	15,000
Gross unrecognized tax benefits – ending balance	$ 297,600	$ 278,200