Quarterly report pursuant to Section 13 or 15(d)

Goodwill and intangible assets (Tables)

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Goodwill and intangible assets (Tables)
 6 Months Ended
Jan. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Indefinite-Lived Intangible Assets [Table Text Block] The Company’s change in the net carrying amount of intangible assets, all in the Life Sciences segment is as follows:

    Gross     Accumulated Amortization     Net  
July 31, 2015   $ 27,838     $ (21,683 )   $ 6,155  
Amortization expense     —       (843 )     (843 )
Foreign currency translation     (350 )     259       (91 )
January 31, 2016   $ 27,488     $ (22,267 )   $ 5,221  
Schedule of Intangible Assets [Table Text Block] Intangible assets, all finite lived, consist of the following:

    January 31, 2016     July 31, 2015  
    Gross     Accumulated
Amortization 		    Net     Gross     Accumulated
Amortization 		    Net  
Patents   $ 11,027     $ (10,888 )   $ 139     $ 11,028     $ (10,871 )   $ 157  
Customer relationships     12,046       (7,785 )     4,261       12,243       (7,398 )     4,845  
Website and acquired content     1,006       (1,006 )     —       1,020       (1,020 )     —  
Licensed technology and other     499       (437 )     62       518       (441 )     77  
Trademarks     2,910       (2,151 )     759       3,029       (1,953 )     1,076  
Total   $ 27,488     $ (22,267 )   $ 5,221     $ 27,838     $ (21,683 )   $ 6,155  
Schedule of Useful Lives For Acquisitions [Table Text Block] At January 31, 2016, information with respect to intangibles assets acquired is as follows:

    Useful life assigned   Weighted average
remaining useful life 		 
Customer relationships   8-15 years   4.5 years  
Trademarks   5 years   1.5 years  
Other intangibles   10 years   3.5 years