Schedule of Cash, Cash Equivalents, and Restricted Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Apr. 30, 2021	Jul. 31, 2020	Apr. 30, 2020	Jul. 31, 2019
Cash and Cash Equivalents [Abstract]
Cash and cash equivalents	$ 84,017	$ 84,860
Restricted cash and cash equivalents	110,992	116,362
Total cash, cash equivalents, and restricted cash and cash equivalents	$ 195,009	$ 201,222	$ 166,453	$ 257,199