Income Taxes (Details 1) - USD ($)	12 Months Ended
	Aug. 31, 2017	Aug. 31, 2016
Current:
Expected income tax benefit at statutory rate	$ 2,112,000	$ 2,234,000
Increase (decrease) in taxes due to:
State tax, net of federal benefit	297,000	303,000
Permanent differences	25,000	29,000
Change in deferred tax asset valuation allowance	(4,000)	(121,000)
Other, net	(139,000)	(12,000)
Income tax expense	$ 2,291,000	$ 2,433,000