Quarterly report pursuant to Section 13 or 15(d)

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

v3.6.0.2
Goodwill and intangible assets (Details) - Schedule of indefinite-lived intangible assets - USD ($)
$ in Thousands
6 Months Ended
Jan. 31, 2017
Jan. 31, 2016
Indefinite-lived Intangible Assets [Line Items]    
July 31, 2016 $ 27,650  
July 31, 2016 (23,228)  
July 31, 2016 4,422  
Amortization expense (819) $ (843)
Amortization expense (819) $ (843)
January 31, 2017 27,447  
January 31, 2017 (23,887)  
January 31, 2017 3,560  
Life Sciences [Member]    
Indefinite-lived Intangible Assets [Line Items]    
July 31, 2016 27,650  
July 31, 2016 (23,228)  
July 31, 2016 4,422  
Amortization expense (819)  
Amortization expense (819)  
Foreign currency translation (203)  
Foreign currency translation 160  
Foreign currency translation (43)  
January 31, 2017 27,447  
January 31, 2017 (23,887)  
January 31, 2017 $ 3,560