Accrued Expenses (Details) - USD ($) $ in Thousands	Jul. 31, 2015	Jul. 31, 2014
Accrued Expenses [Abstract]
Payroll, commissions and employee benefits	$ 2,337	$ 1,402
Operations/services	959	832
Taxes other than income	280	611
Accrued expenses	$ 3,576	$ 2,845