Income Taxes (Details 1) - USD ($)	12 Months Ended
	Aug. 31, 2018	Aug. 31, 2017
Current:
Expected income tax benefit at statutory rate	$ 2,601,000	$ 2,112,000
Increase (decrease) in taxes due to:
State tax, net of federal benefit	546,000	297,000
Permanent differences	28,000	25,000
Change in deferred tax asset valuation allowance	1,000	(4,000)
Other, net	(5,000)	(139,000)
Income tax expense	$ 3,171,000	$ 2,291,000