Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Nov. 02, 2019	Oct. 27, 2018
Condensed Consolidated Statements of Comprehensive Income (Unaudited) [Abstract]
Net loss including noncontrolling interests	$ (1,400)	$ (115)
Foreign currency translation adjustments	(214)	(127)
Comprehensive loss	(1,614)	(242)
Comprehensive (income) loss attributable to noncontrolling interests	(88)	55
Comprehensive loss attributable to Ecology and Environment Inc.	$ (1,702)	$ (187)