Fair Value of Financial Instruments (Details) - USD ($)	Aug. 31, 2020	Aug. 31, 2019
Marketable securities	$ 1,368,000	$ 1,873,000
Liability for short sales of trading securities	(2,916,000)	(655,000)
Fair Value, Inputs, Level 1 [Member]
Marketable securities	1,368,000	1,873,000
Liability for short sales of trading securities	(2,916,000)	(655,000)
Fair Value, Inputs, Level 2 [Member]
Marketable securities	0	0
Liability for short sales of trading securities	0	0
Fair Value, Inputs, Level 3 [Member]
Marketable securities	0	0
Liability for short sales of trading securities	$ 0	$ 0