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Inventories
3 Months Ended
Oct. 31, 2019
Inventory Disclosure [Abstract]  
Inventory Disclosure [Text Block]

Note 5 – Inventories


Inventories consist of the following:


   October 31,
2019
   July 31,
2019
 
Raw materials  $905   $876 
Work in process   2,574    2,566 
Finished products   4,089    4,400 
   $7,568   $7,842