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Goodwill and intangible assets
3 Months Ended
Oct. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets Disclosure [Text Block]

Note 5 – Goodwill and intangible assets


At October 31, 2017 and July 31, 2017, the Company’s carrying amount of goodwill, related to the Clinical Labs segment, is $7,452.


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       (228)   (228)
Foreign currency translation   (118)   98    (20)
October 31, 2017  $27,318   $(24,671)  $2,647 

Intangible assets, all finite lived, consist of the following:


   October 31, 2017   July 31, 2017 
   Gross   Accumulated
Amortization
   Net   Gross   Accumulated
Amortization
   Net 
Patents  $11,026   $(10,957)  $69   $11,027   $(10,951)  $76 
Customer relationships   11,823    (9,260)   2,563    11,881    (9,083)   2,798 
Website and acquired content   1,007    (1,007)       1,011    (1,011)    
Licensed technology and other   485    (470)   15    484    (463)   21 
Trademarks   2,977    (2,977)       3,033    (3,033)    
Total  $27,318   $(24,671)  $2,647   $27,436   $(24,541)  $2,895 

At October 31, 2017, information with respect to intangibles assets acquired is as follows:


   Useful life
assigned
  Weighted average
remaining useful life
Customer relationships  8 -15 years  3 years
Other intangibles  10 years  2 years

At October 31, 2017, the weighted average useful life of intangible assets is approximately two years.