Leases (Lease Cost and Additional Information) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2024	Apr. 30, 2023
Leases [Abstract]
Amortization of ROU assets	$ 0	$ 1,000	$ 0	$ 5,000
Operating lease expense	2,023,000	2,495,000	6,361,000	8,088,000
Short-term lease expense	44,000	108,000	217,000	326,000
Variable lease expense	1,259,000	783,000	3,204,000	2,881,000
Sublease income	(17,000)	(17,000)	(50,000)	(50,000)
Total lease expense	$ 3,309,000	$ 3,370,000	9,732,000	11,250,000
Operating leases - Operating cash outflows			6,796,000	8,183,000
Finance leases - Financing cash outflows			0	4,000
ROU assets obtained in the exchange for lease liabilities (non-cash): operating leases			$ 37,000	$ 2,850,000