Income Taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Aug. 31, 2019	Aug. 31, 2018
Income Taxes
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	25.70%
Deferred Income Tax Expense (Benefit)	$ (445,000)	$ 297,000
Effective Income Tax Rate Reconciliation, Percent	27.30%	31.30%
Income Tax Expense (Benefit)	$ 3,540,000	$ 3,171,000
GILTI inclusion amount	1,100,000
GILTI deduction amount	546,000
Allowable indirect foreign tax credit	206,000
FDII deduction amount	$ 61,500