Income Taxes (Provision for Income Taxes) (Details) - USD ($)	12 Months Ended
	Jul. 31, 2023	Jul. 31, 2022	Jul. 31, 2021
Income Tax Disclosure [Abstract]
Federal - current	$ (258,000)	$ 287,000	$ 608,000
Federal - deferred	(4,623,000)	(4,888,000)	(877,000)
State and local - current	1,412,000	348,000	466,000
State and local - deferred	(815,000)	(442,000)	(598,000)
Foreign - current	958,000	1,197,000	688,000
Foreign - deferred	(622,000)	(525,000)	(1,787,000)
Benefit from income taxes	$ (3,948,000)	$ (4,023,000)	$ (1,500,000)