Goodwill and Other Intangibles (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2014
Goodwill and Other Intangibles (Textual)
Amortization expense of intangible assets	$ 0.4	$ 0.4	$ 0.6
Amortization expense of intangible assets in fiscal 2017	0.3
Amortization expense of intangible assets in fiscal 2018	0.1
Amortization expense of intangible assets in fiscal 2019	0.1
Amortization expense of intangible assets in fiscal 2020	0.1
Amortization expense of intangible assets in fiscal 2021	$ 0.1