Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2014
Maximum [Member]
Assets [Abstract]
Gross unrealized gains (losses)	$ 100	$ 100	$ 100
Recurring [Member]
Assets [Abstract]
Investment securities available for sale	1,598	1,434
Recurring [Member] | Level 1 [Member]
Assets [Abstract]
Investment securities available for sale	1,598	1,434
Recurring [Member] | Level 2 [Member]
Assets [Abstract]
Investment securities available for sale	0	0
Recurring [Member] | Level 3 [Member]
Assets [Abstract]
Investment securities available for sale	$ 0	$ 0