Profit Sharing Plan (Details Textual) - USD ($)	12 Months Ended
	Aug. 31, 2017	Aug. 31, 2016
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	50.00%
Defined Contribution Plan, Administrative Expenses	$ 236,000	$ 223,000
Description of Defined Contribution Pension and Other Postretirement Plans	five-year
Employee Contributions [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	4.00%
Deferred Profit Sharing [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	15.00%