Annual report pursuant to Section 13 and 15(d)

Goodwill and intangible assets (Details) - Schedule of useful lives for acquisitions

v3.7.0.1
Goodwill and intangible assets (Details) - Schedule of useful lives for acquisitions
 12 Months Ended
Jul. 31, 2017
Goodwill and intangible assets (Details) - Schedule of useful lives for acquisitions [Line Items]  
Useful life assigned 10 years
Customer Relationships [Member]  
Goodwill and intangible assets (Details) - Schedule of useful lives for acquisitions [Line Items]  
Weighted average remaining useful life 3 years
Trademarks [Member]  
Goodwill and intangible assets (Details) - Schedule of useful lives for acquisitions [Line Items]  
Useful life assigned 5 years
Other Intangible Assets [Member]  
Goodwill and intangible assets (Details) - Schedule of useful lives for acquisitions [Line Items]  
Useful life assigned 10 years
Weighted average remaining useful life 2 years
Minimum [Member]  
Goodwill and intangible assets (Details) - Schedule of useful lives for acquisitions [Line Items]  
Useful life assigned 4 years
Minimum [Member] | Customer Relationships [Member]  
Goodwill and intangible assets (Details) - Schedule of useful lives for acquisitions [Line Items]  
Useful life assigned 8 years
Maximum [Member]  
Goodwill and intangible assets (Details) - Schedule of useful lives for acquisitions [Line Items]  
Useful life assigned 15 years
Maximum [Member] | Customer Relationships [Member]  
Goodwill and intangible assets (Details) - Schedule of useful lives for acquisitions [Line Items]  
Useful life assigned 15 years