Fair Value Measurements (Details) - Schedule of assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2020	Oct. 31, 2019
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance, beginning of period	$ 3,825	$ 3,619
Redemption for Visa mandatory release assessment	(1,870)
Total (losses) gains included in “Other (expense) income, net”	(130)	18
Balance, end of period	1,825	3,637
Change in unrealized gains or losses for the period included in earnings for assets held at the end of the period