Quarterly report pursuant to Section 13 or 15(d)

Inventories (Tables)

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Inventories (Tables)
 6 Months Ended
Jan. 31, 2018
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block] Inventories consist of the following:

    January 31,
2018		     July 31,
2017		  
Raw materials   $ 809     $ 852  
Work in process     1,951       1,905  
Finished products     4,721       4,290  
    $ 7,481     $ 7,047