Quarterly report pursuant to Section 13 or 15(d)

Inventories (Tables)

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Inventories (Tables)
3 Months Ended
Oct. 31, 2019
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block] 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