Equity Investments (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2017
Equity Securities, FV-NI, Gain (Loss) [Abstract]
Net gains recognized during the period on equity investments	$ 1,779	$ (6)	$ 355
Less: net gains and losses recognized during the period on equity investments redeemed during the period			(378)
Unrealized gains recognized during the period on equity investments still held at the reporting date	$ 1,779	$ (6)	$ (23)