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Cash, Cash Equivalents, and Restricted Cash and Cash Equivalents (Details) - Schedule of cash, cash equivalents, and restricted cash and cash equivalents - USD ($)
$ in Thousands
Jul. 31, 2020
Jul. 31, 2019
Jul. 31, 2018
Schedule of cash, cash equivalents, and restricted cash and cash equivalents [Abstract]      
Cash and cash equivalents $ 84,860 $ 80,168  
Restricted cash and cash equivalents 116,362 177,031  
Total cash, cash equivalents, and restricted cash and cash equivalents $ 201,222 $ 257,199 $ 203,197