Income Taxes (Details) - USD ($)	3 Months Ended		6 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020
Income Taxes
Income Tax Expense (Benefit)	$ 524,000	$ 934,000	$ 822,000	$ 2,010,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	27.30%		26.80%
Effective Income Tax Rate Reconciliation, Percent			21.00%