Schedule of Carrying Value of Equity Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2021	Jul. 31, 2020
Equity Investments
Balance, beginning of period	$ 4,109	$ 3,919
Redemption for Visa mandatory release assessment	(1,870)
Adjustment for observable transactions involving a similar investment from the same issuer	510	206
Upward adjustments		3
Redemptions	(6)	(19)
Impairments
BALANCE, END OF PERIOD	$ 2,743	$ 4,109