Quarterly report pursuant to Section 13 or 15(d)

Inventories (Tables)

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Inventories (Tables)
 3 Months Ended
Oct. 31, 2017
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block] Inventories consist of the following:

    October 31,
2017		     July 31,
2017		  
Raw materials   $ 878     $ 852  
Work in process     1,881       1,905  
Finished products     4,451       4,290  
    $ 7,210     $ 7,047