Schedule of Unrealized (losses) Gains for All Equity Investments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2022	Apr. 30, 2021
Cash and Cash Equivalents [Abstract]
Net (losses) gains recognized during the period on equity investments	$ (3,416)	$ 5,435	$ (20,862)	$ 5,822
Less: net gains recognized during the period on equity investments sold during the period			10
Unrealized (losses) gains recognized during the period on equity investments still held at the reporting date	$ (3,416)	$ 5,435	$ (20,872)	$ 5,822