Quarterly report pursuant to Section 13 or 15(d)

Inventories (Details) - Schedule of inventory, current

v3.19.2
Inventories (Details) - Schedule of inventory, current - USD ($)
$ in Thousands
Apr. 30, 2019
Jul. 31, 2018
Schedule of inventory, current [Abstract]    
Raw materials $ 895 $ 754
Work in process 2,480 2,174
Finished products 4,220 4,350
$ 7,595 $ 7,278