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, 2017
Jul. 31, 2016
Schedule of inventory, current [Abstract]    
Raw materials $ 939 $ 951
Work in process 1,881 1,755
Finished products 4,350 4,265
$ 7,170 $ 6,971