Quarterly report pursuant to Section 13 or 15(d)

Goodwill and intangible assets (Details) - Schedule of indefinite-lived intangible assets

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Goodwill and intangible assets (Details) - Schedule of indefinite-lived intangible assets (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Oct. 31, 2013
Oct. 31, 2012
Jul. 31, 2013
Indefinite-lived Intangible Assets [Line Items]      
Gross $ 28,454   $ 28,214
Accumulated Amortization (18,890)   (18,271)
Net 9,564   9,943
Amortization expense (468) (497)  
Life Sciences [Member]
     
Indefinite-lived Intangible Assets [Line Items]      
Gross 28,454   28,214
Accumulated Amortization (18,890)   (18,271)
Net 9,564   9,943
Amortization expense (468)    
Foreign currency translation 240    
Foreign currency translation (151)    
Foreign currency translation $ 89