Fair Value of Financial Instruments (Tables)

12 Months Ended

Aug. 31, 2017

Fair Value Disclosures [Abstract]

Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block]

The following table sets forth by level, within the fair value hierarchy, certain assets at estimated fair value as of August 31, 2017 and 2016:

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
August 31, 2017
Marketable securities	$	1,596,000	$	—	$	—	$	1,596,000
Liability for short sales of trading securities		(707,000)		—		—		(707,000)
August 31, 2016
Marketable securities		540,000		—		—		540,000
Liability for short sales of trading securities		(1,425,000)		—		—		(1,425,000)