Contingent Liabilities (Schedule Of Changes In Holdback And Earn-Out Payable) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jul. 31, 2015
Contingent Liabilities [Abstract]
Beginning balance	$ 1,116	$ 448
Additions		711
Adjustments	(62)
Payments	(382)	(292)
Imputed interest recognized	14	28
Loss on change in fair value of earn-out	8
Ending balance	694	895
Less current portion	(470)	(668)	$ (754)
Ending balance, long-term	$ 224	$ 227	$ 362