Quarterly report pursuant to Section 13 or 15(d)

Inventories (Details) - Schedule of inventory, current

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Inventories (Details) - Schedule of inventory, current - USD ($)
$ in Thousands
Apr. 30, 2018
Jul. 31, 2017
Schedule of inventory, current [Abstract]    
Raw materials $ 817 $ 852
Work in process 2,065 1,905
Finished products 4,396 4,290
$ 7,278 $ 7,047