Note 9 - Net (Loss) Income Per Common Share - Reconciliation of the Earnings Per Share Computations (Details) - USD ($)	3 Months Ended
	Nov. 30, 2020	Nov. 30, 2019
Net income	$ 1,262,399	$ 1,212,550
Basic – weighted shares outstanding (in shares)	9,104,623	9,095,607
Weighted shares assumed upon exercise of stock options (in shares)	540,007	312,035
Diluted – weighted shares outstanding (in shares)	9,644,630	9,407,642
Basic net income per share: (in dollars per share)	$ 0.14	$ 0.13
Diluted net income per share: (in dollars per share)	$ 0.13	$ 0.13