Accrued Liabilities (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Apr. 30, 2020	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2022
Payables and Accruals [Abstract]
Payment advance	$ 2,526
Deferred revenue related to the CMS payment advance		$ 1,847	$ 2,526
Reserves amount		$ 300		$ 260