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Goodwill and Other Intangibles (Details Textual) - USD ($)
$ in Millions
 12 Months Ended
Jul. 31, 2015
Jul. 31, 2014
Jul. 31, 2013
Goodwill and Other Intangibles [Abstract]      
Amortization expense of intangible assets $ 0.4 $ 0.6 $ 0.6
Amortization expense of intangible assets year one 0.4    
Amortization expense of intangible assets year two 0.3    
Amortization expense of intangible assets year three 0.1    
Amortization expense of intangible assets year four 0.1    
Amortization expense of intangible assets year five $ 0.1