Income Taxes (Details Textual) - USD ($)	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	May 31, 2018	May 31, 2018	May 31, 2017	May 31, 2018	May 31, 2017	Aug. 31, 2018	Aug. 31, 2017
Income Tax Expense (Benefit)		$ 993,000	$ 848,000	$ 2,310,000	$ 1,709,000
Effective Income Tax Rate Reconciliation, Percent			39.90%		38.90%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			30.60%	21.00%	32.60%		35.00%
Deferred Income Tax Expense (Benefit)	$ 141,591
Scenario, Plan [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent						21.00%