Condensed Consolidated Statement of Operations (Unaudited) (USD $)	3 Months Ended
	Oct. 31, 2013	Oct. 31, 2012
Condensed Consolidated Statement of Operations (Unaudited) [Abstract]
Revenue, net	$ 34,749,291	$ 36,821,768
Cost of professional services and other direct operating expenses	12,568,742	13,308,000
Subcontract costs	5,846,251	7,015,358
Administrative and indirect operating expenses	10,869,243	11,066,514
Marketing and related costs	3,458,615	3,874,155
Depreciation and amortization	1,053,954	583,288
Income from operations	952,486	974,453
Interest expense	(49,774)	(83,750)
Interest income	43,475	58,420
Other income (expense)	120,031	(6,242)
Net foreign exchange loss	(10,426)	(45,170)
Income before income tax provision	1,055,792	897,711
Income tax provision	540,678	354,615
Net income	515,114	543,096
Net income attributable to noncontrolling interests	(134,723)	(300,569)
Net income attributable to Ecology and Environment, Inc.	$ 380,391	$ 242,527
Net income per common share: basic and diluted (in dollars per share)	$ 0.09	$ 0.06
Weighted average common shares outstanding: basic and diluted (in shares)	4,261,674	4,244,010