Income Taxes (Provision for Income Taxes) (Details) - USD ($)	12 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2014
Income Tax Disclosure [Abstract]
Federal - current	$ 2,297,000	$ 12,367,000	$ 11,629,000
Federal - deferred	(2,930,000)	(2,342,000)	(368,000)
State and local - current	408,000	931,000	1,623,000
State and local - deferred	(310,000)	(25,000)	(33,000)
Foreign - current	81,000	(173,000)	506,000
Foreign - deferred	0	0	(1,000)
(Benefit from) provision for income taxes	$ (454,000)	$ 10,758,000	$ 13,356,000