Leases (Details) - Schedule of components of net lease cost - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jan. 31, 2020	Jan. 31, 2020
Schedule of components of net lease cost [Abstract]
Operating lease cost	$ 1,474	$ 2,948
Finance lease cost:
Amortization of leased assets	60	115
Interest on lease liabilities	22	34
Net lease cost	$ 1,556	$ 3,097