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Summary of Significant Accounting Policies (Details 3)
12 Months Ended
Jul. 31, 2015
USD ($)
Identifiable intangible assets  
Intangible assets impairment $ 0
Goodwill impairment $ 0
Dialysis  
Identifiable intangible assets  
Percentage of estimated fair value exceeding book value 17.00%
Minimum  
Identifiable intangible assets  
Estimated useful lives 3 years
Maximum  
Identifiable intangible assets  
Estimated useful lives 20 years