Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended
	Oct. 31, 2015	Nov. 01, 2014
Condensed Consolidated Statements of Operations (Unaudited) [Abstract]
Revenue, net	$ 30,032,098	$ 33,190,651
Cost of professional services and other direct operating expenses	10,984,110	12,614,550
Subcontract costs	5,595,221	5,678,218
Administrative and indirect operating expenses	7,637,474	9,392,996
Marketing and related costs	2,953,108	3,388,640
Depreciation and amortization	294,948	362,729
Income from operations	2,567,237	1,753,518
Interest income	11,462	23,039
Interest expense	(24,078)	(18,241)
Gain on sale of assets and investment securities	(20)	140,385
Net foreign exchange gain	12,641	65,498
Other expense	52,731	(2,535)
Income before income tax provision	2,619,973	1,961,664
Income tax provision	2,037,266	825,543
Net income	582,707	1,136,121
Net loss (income) attributable to noncontrolling interests	81,386	(288,961)
Net income attributable to Ecology and Environment, Inc.	$ 664,093	$ 847,160
Net income per common share: basic and diluted (in dollars per share)	$ 0.15	$ 0.20
Weighted average common shares outstanding: basic and diluted (in shares)	4,288,404	4,288,371