Leases (Lease Cost and Additional Information) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2025	Jan. 31, 2024
Leases [Abstract]
Operating lease expense	$ 1,860,000	$ 2,080,000	$ 3,774,000	$ 4,338,000
Short-term lease expense	32,000	65,000	64,000	173,000
Variable lease expense	1,123,000	916,000	2,300,000	1,945,000
Sublease income	(11,000)	(16,000)	(28,000)	(33,000)
Total lease expense	$ 3,004,000	$ 3,045,000	6,110,000	6,423,000
Operating leases - Operating cash outflows			4,245,000	4,439,000
ROU assets obtained in the exchange for lease liabilities (non-cash): operating leases			$ 1,853,000	$ 20,000