Annual report pursuant to Section 13 and 15(d)

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

v2.4.0.8
Goodwill and intangible assets (Details) - Schedule of useful lives for acquisitions
 1 Months Ended 12 Months Ended
May 31, 2012
Jul. 31, 2013
Goodwill and intangible assets (Details) - Schedule of useful lives for acquisitions [Line Items]    
Useful life assigned   10 years
Trademarks [Member]
    
Goodwill and intangible assets (Details) - Schedule of useful lives for acquisitions [Line Items]    
Useful life assigned 5 years 5 years
Minimum [Member] | Customer Relationships [Member]
    
Goodwill and intangible assets (Details) - Schedule of useful lives for acquisitions [Line Items]    
Useful life assigned   8 years
Minimum [Member] | Other Intangible Assets [Member]
    
Goodwill and intangible assets (Details) - Schedule of useful lives for acquisitions [Line Items]    
Useful life assigned   4 years
Minimum [Member]
    
Goodwill and intangible assets (Details) - Schedule of useful lives for acquisitions [Line Items]    
Useful life assigned   4 years
Maximum [Member] | Customer Relationships [Member]
    
Goodwill and intangible assets (Details) - Schedule of useful lives for acquisitions [Line Items]    
Useful life assigned   15 years
Maximum [Member] | Other Intangible Assets [Member]
    
Goodwill and intangible assets (Details) - Schedule of useful lives for acquisitions [Line Items]    
Useful life assigned   5 years
Maximum [Member]
    
Goodwill and intangible assets (Details) - Schedule of useful lives for acquisitions [Line Items]    
Useful life assigned   15 years
Weighted Average [Member] | Customer Relationships [Member]
    
Goodwill and intangible assets (Details) - Schedule of useful lives for acquisitions [Line Items]    
Useful life assigned   7 years
Weighted Average [Member] | Trademarks [Member]
    
Goodwill and intangible assets (Details) - Schedule of useful lives for acquisitions [Line Items]    
Useful life assigned   4 years
Weighted Average [Member] | Other Intangible Assets [Member]
    
Goodwill and intangible assets (Details) - Schedule of useful lives for acquisitions [Line Items]    
Useful life assigned   2 years