Equity Investments (Details) - Schedule of unrealized (losses) gains for all equity investments - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2021	Jan. 31, 2020
Schedule of unrealized (losses) gains for all equity investments [Abstract]
Net gains recognized during the period on equity investments	$ 1,307	$ 383	$ 387	$ 409
Less: net gains and losses recognized during the period on equity investments sold during the period
Unrealized gains recognized during the period on equity investments still held at the reporting date	$ 1,307	$ 383	$ 387	$ 409