Summary of Changes in Valuation Allowance (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2023	Jul. 31, 2022	Jul. 31, 2021
Income Tax Disclosure [Abstract]
Balance at beginning of year	$ 11,588	$ 11,540	$ 58,700
Additions charged to costs and expenses	2,537	48	835
Deductions	(3,507)		(47,995)
Balance at end of year	$ 10,618	$ 11,588	$ 11,540