Quarterly report pursuant to Section 13 or 15(d)

Goodwill and intangible assets (Tables)

v3.8.0.1
Goodwill and intangible assets (Tables)
 9 Months Ended
Apr. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Indefinite-Lived Intangible Assets [Table Text Block] The Company’s change in the carrying amount of intangible assets, all in the Life Sciences segment is as follows:

    Gross     Accumulated
Amortization		     Net  
July 31, 2017   $ 27,436     $ (24,541 )   $ 2,895  
Amortization expense     —       (742 )     (742 )
Foreign currency translation     2       (6 )     (4 )
April 30, 2018   $ 27,438     $ (25,289 )   $ 2,149  
Schedule of Intangible Assets [Table Text Block] Intangible assets, all finite lived, consist of the following:

    April 30, 2018     July 31, 2017  
    Gross     Accumulated
Amortization		     Net     Gross     Accumulated
Amortization		     Net  
Patents   $ 11,027     $ (10,971 )   $ 56     $ 11,027     $ (10,951 )   $ 76  
Customer relationships     11,892       (9,799 )     2,093       11,881       (9,083 )     2,798  
Website and acquired content     1,010       (1,010 )     —       1,011       (1,011 )     —  
Licensed technology and other     492       (492 )     —       484       (463 )     21  
Trademarks     3,017       (3,017 )     —       3,033       (3,033 )     —  
Total   $ 27,438     $ (25,289 )   $ 2,149     $ 27,436     $ (24,541 )   $ 2,895  
Schedule of Useful Lives For Acquisitions [Table Text Block] At April 30, 2018, information with respect to intangibles assets acquired is as follows:

    Useful life
assigned		   Weighted average
remaining useful life		  
Customer relationships   8 -15 years   2.5 years  
Other intangibles   10 years   1.5 years