Operating Leases (Details) - USD ($)	12 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2013
Approximate minimum rental commitment under non-cancelable operating leases [Abstract]
2016	$ 267,000
2017	122,000
2018	67,000
2019	41,000
2020	10,000
Total	507,000
Rent expenses	$ 491,000	$ 457,000	$ 364,000