Commitments and Contingencies (Details)	9 Months Ended
	Apr. 30, 2016 USD ($) Employee	Apr. 30, 2016 BRL	Jul. 31, 2015 USD ($)
Loss Contingencies [Line Items]
Other accrued liabilities | $	$ 3,366,963		$ 3,931,284
Pending Litigation [Member] | Ecology and Environment do Brasil LTDA [Member]
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss | BRL		BRL 520,000
Number of employees individually served with notices of infraction	4
Settled Litigation [Member] | Ecology and Environment do Brasil LTDA [Member]
Loss Contingencies [Line Items]
Other accrued liabilities | $	$ 300,000
Number of employees individually served with claim of violations dismissed	1
Number of employees that have fines assessed against them, which are being appealed	3