Note 12 - Retirement Plan (Details Textual) - USD ($)	12 Months Ended
	Aug. 31, 2019	Aug. 31, 2018
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	15.00%
Defined Contribution Plan Maximum Amount of Employees Contributions Percent	50.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	3.50%
Defined Contribution Plan, Cost	$ 228,605	$ 219,379